content: /* Copyright (C) 2016-2018 Alibaba Group Holding Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  
  // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // http://code.google.com/p/protobuf/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf.test;
  import com.google.protobuf.*;
  
  import protobuf_unittest.UnittestProto;
  
  // The static imports are to avoid 100+ char lines.  The following is roughly equivalent to
  // import static protobuf_unittest.UnittestProto.*;
  import static protobuf_unittest.UnittestProto.defaultInt32Extension;
  import static protobuf_unittest.UnittestProto.defaultInt64Extension;
  import static protobuf_unittest.UnittestProto.defaultUint32Extension;
  import static protobuf_unittest.UnittestProto.defaultUint64Extension;
  import static protobuf_unittest.UnittestProto.defaultSint32Extension;
  import static protobuf_unittest.UnittestProto.defaultSint64Extension;
  import static protobuf_unittest.UnittestProto.defaultFixed32Extension;
  import static protobuf_unittest.UnittestProto.defaultFixed64Extension;
  import static protobuf_unittest.UnittestProto.defaultSfixed32Extension;
  import static protobuf_unittest.UnittestProto.defaultSfixed64Extension;
  import static protobuf_unittest.UnittestProto.defaultFloatExtension;
  import static protobuf_unittest.UnittestProto.defaultDoubleExtension;
  import static protobuf_unittest.UnittestProto.defaultBoolExtension;
  import static protobuf_unittest.UnittestProto.defaultStringExtension;
  import static protobuf_unittest.UnittestProto.defaultBytesExtension;
  import static protobuf_unittest.UnittestProto.defaultNestedEnumExtension;
  import static protobuf_unittest.UnittestProto.defaultForeignEnumExtension;
  import static protobuf_unittest.UnittestProto.defaultImportEnumExtension;
  import static protobuf_unittest.UnittestProto.defaultStringPieceExtension;
  import static protobuf_unittest.UnittestProto.defaultCordExtension;
  
  import static protobuf_unittest.UnittestProto.optionalInt32Extension;
  import static protobuf_unittest.UnittestProto.optionalInt64Extension;
  import static protobuf_unittest.UnittestProto.optionalUint32Extension;
  import static protobuf_unittest.UnittestProto.optionalUint64Extension;
  import static protobuf_unittest.UnittestProto.optionalSint32Extension;
  import static protobuf_unittest.UnittestProto.optionalSint64Extension;
  import static protobuf_unittest.UnittestProto.optionalFixed32Extension;
  import static protobuf_unittest.UnittestProto.optionalFixed64Extension;
  import static protobuf_unittest.UnittestProto.optionalSfixed32Extension;
  import static protobuf_unittest.UnittestProto.optionalSfixed64Extension;
  import static protobuf_unittest.UnittestProto.optionalFloatExtension;
  import static protobuf_unittest.UnittestProto.optionalDoubleExtension;
  import static protobuf_unittest.UnittestProto.optionalBoolExtension;
  import static protobuf_unittest.UnittestProto.optionalStringExtension;
  import static protobuf_unittest.UnittestProto.optionalBytesExtension;
  import static protobuf_unittest.UnittestProto.optionalGroupExtension;
  import static protobuf_unittest.UnittestProto.optionalCordExtension;
  import static protobuf_unittest.UnittestProto.optionalForeignEnumExtension;
  import static protobuf_unittest.UnittestProto.optionalForeignMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalImportEnumExtension;
  import static protobuf_unittest.UnittestProto.optionalImportMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalNestedEnumExtension;
  import static protobuf_unittest.UnittestProto.optionalNestedMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalPublicImportMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalLazyMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalStringPieceExtension;
  
  import static protobuf_unittest.UnittestProto.repeatedInt32Extension;
  import static protobuf_unittest.UnittestProto.repeatedInt64Extension;
  import static protobuf_unittest.UnittestProto.repeatedUint32Extension;
  import static protobuf_unittest.UnittestProto.repeatedUint64Extension;
  import static protobuf_unittest.UnittestProto.repeatedSint32Extension;
  import static protobuf_unittest.UnittestProto.repeatedSint64Extension;
  import static protobuf_unittest.UnittestProto.repeatedFixed32Extension;
  import static protobuf_unittest.UnittestProto.repeatedFixed64Extension;
  import static protobuf_unittest.UnittestProto.repeatedSfixed32Extension;
  import static protobuf_unittest.UnittestProto.repeatedSfixed64Extension;
  import static protobuf_unittest.UnittestProto.repeatedFloatExtension;
  import static protobuf_unittest.UnittestProto.repeatedDoubleExtension;
  import static protobuf_unittest.UnittestProto.repeatedBoolExtension;
  import static protobuf_unittest.UnittestProto.repeatedStringExtension;
  import static protobuf_unittest.UnittestProto.repeatedBytesExtension;
  import static protobuf_unittest.UnittestProto.repeatedGroupExtension;
  import static protobuf_unittest.UnittestProto.repeatedNestedMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedForeignMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedImportMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedLazyMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedNestedEnumExtension;
  import static protobuf_unittest.UnittestProto.repeatedForeignEnumExtension;
  import static protobuf_unittest.UnittestProto.repeatedImportEnumExtension;
  import static protobuf_unittest.UnittestProto.repeatedStringPieceExtension;
  import static protobuf_unittest.UnittestProto.repeatedCordExtension;
  
  import static protobuf_unittest.UnittestProto.OptionalGroup_extension;
  import static protobuf_unittest.UnittestProto.RepeatedGroup_extension;
  
  import static protobuf_unittest.UnittestProto.packedInt32Extension;
  import static protobuf_unittest.UnittestProto.packedInt64Extension;
  import static protobuf_unittest.UnittestProto.packedUint32Extension;
  import static protobuf_unittest.UnittestProto.packedUint64Extension;
  import static protobuf_unittest.UnittestProto.packedSint32Extension;
  import static protobuf_unittest.UnittestProto.packedSint64Extension;
  import static protobuf_unittest.UnittestProto.packedFixed32Extension;
  import static protobuf_unittest.UnittestProto.packedFixed64Extension;
  import static protobuf_unittest.UnittestProto.packedSfixed32Extension;
  import static protobuf_unittest.UnittestProto.packedSfixed64Extension;
  import static protobuf_unittest.UnittestProto.packedFloatExtension;
  import static protobuf_unittest.UnittestProto.packedDoubleExtension;
  import static protobuf_unittest.UnittestProto.packedBoolExtension;
  import static protobuf_unittest.UnittestProto.packedEnumExtension;
  
  
  import protobuf_unittest.UnittestProto.TestAllExtensions;
  import protobuf_unittest.UnittestProto.TestAllExtensionsOrBuilder;
  import protobuf_unittest.UnittestProto.TestAllTypes;
  import protobuf_unittest.UnittestProto.TestAllTypesOrBuilder;
  import protobuf_unittest.UnittestProto.TestPackedExtensions;
  import protobuf_unittest.UnittestProto.TestPackedTypes;
  import protobuf_unittest.UnittestProto.TestUnpackedTypes;
  import protobuf_unittest.UnittestProto.ForeignMessage;
  import protobuf_unittest.UnittestProto.ForeignEnum;
  import com.google.protobuf.test.UnittestImport.ImportEnum;
  import com.google.protobuf.test.UnittestImport.ImportMessage;
  import com.google.protobuf.test.UnittestImportPublic.PublicImportMessage;
  
  import junit.framework.Assert;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.RandomAccessFile;
  
  /**
   * Contains methods for setting all fields of {@code TestAllTypes} to
   * some values as well as checking that all the fields are set to those values.
   * These are useful for testing various protocol message features, e.g.
   * set all fields of a message, serialize it, parse it, and check that all
   * fields are set.
   *
   * <p>This code is not to be used outside of {@code com.google.protobuf} and
   * subpackages.
   *
   * @author kenton@google.com Kenton Varda
   */
  public final class TestUtil {
    private TestUtil() {}
  
    /** Helper to convert a String to ByteString. */
    static ByteString toBytes(String str) {
      try {
        return ByteString.copyFrom(str.getBytes("UTF-8"));
      } catch(java.io.UnsupportedEncodingException e) {
        throw new RuntimeException("UTF-8 not supported.", e);
      }
    }
  
    /**
     * Get a {@code TestAllTypes} with all fields set as they would be by
     * {@link #setAllFields(TestAllTypes.Builder)}.
     */
    public static TestAllTypes getAllSet() {
      TestAllTypes.Builder builder = TestAllTypes.newBuilder();
      setAllFields(builder);
      return builder.build();
    }
  
    /**
     * Get a {@code TestAllTypes.Builder} with all fields set as they would be by
     * {@link #setAllFields(TestAllTypes.Builder)}.
     */
    public static TestAllTypes.Builder getAllSetBuilder() {
      TestAllTypes.Builder builder = TestAllTypes.newBuilder();
      setAllFields(builder);
      return builder;
    }
  
    /**
     * Get a {@code TestAllExtensions} with all fields set as they would be by
     * {@link #setAllExtensions(TestAllExtensions.Builder)}.
     */
    public static TestAllExtensions getAllExtensionsSet() {
      TestAllExtensions.Builder builder = TestAllExtensions.newBuilder();
      setAllExtensions(builder);
      return builder.build();
    }
  
    public static TestPackedTypes getPackedSet() {
      TestPackedTypes.Builder builder = TestPackedTypes.newBuilder();
      setPackedFields(builder);
      return builder.build();
    }
  
    public static TestUnpackedTypes getUnpackedSet() {
      TestUnpackedTypes.Builder builder = TestUnpackedTypes.newBuilder();
      setUnpackedFields(builder);
      return builder.build();
    }
  
    public static TestPackedExtensions getPackedExtensionsSet() {
      TestPackedExtensions.Builder builder = TestPackedExtensions.newBuilder();
      setPackedExtensions(builder);
      return builder.build();
    }
  
    /**
     * Set every field of {@code message} to the values expected by
     * {@code assertAllFieldsSet()}.
     */
    public static void setAllFields(TestAllTypes.Builder message) {
      message.setOptionalInt32   (101);
      message.setOptionalInt64   (102);
      message.setOptionalUint32  (103);
      message.setOptionalUint64  (104);
      message.setOptionalSint32  (105);
      message.setOptionalSint64  (106);
      message.setOptionalFixed32 (107);
      message.setOptionalFixed64 (108);
      message.setOptionalSfixed32(109);
      message.setOptionalSfixed64(110);
      message.setOptionalFloat   (111);
      message.setOptionalDouble  (112);
      message.setOptionalBool    (true);
      message.setOptionalString  ("115");
      message.setOptionalBytes   (toBytes("116"));
  
      message.setOptionalGroup(
        TestAllTypes.OptionalGroup.newBuilder().setA(117).build());
      message.setOptionalNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(118).build());
      message.setOptionalForeignMessage(
        ForeignMessage.newBuilder().setC(119).build());
      message.setOptionalImportMessage(
        ImportMessage.newBuilder().setD(120).build());
      message.setOptionalPublicImportMessage(
        PublicImportMessage.newBuilder().setE(126).build());
      message.setOptionalLazyMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(127).build());
  
      message.setOptionalNestedEnum (TestAllTypes.NestedEnum.BAZ);
      message.setOptionalForeignEnum(ForeignEnum.FOREIGN_BAZ);
      message.setOptionalImportEnum (ImportEnum.IMPORT_BAZ);
  
      message.setOptionalStringPiece("124");
      message.setOptionalCord("125");
  
      // -----------------------------------------------------------------
  
      message.addRepeatedInt32   (201);
      message.addRepeatedInt64   (202);
      message.addRepeatedUint32  (203);
      message.addRepeatedUint64  (204);
      message.addRepeatedSint32  (205);
      message.addRepeatedSint64  (206);
      message.addRepeatedFixed32 (207);
      message.addRepeatedFixed64 (208);
      message.addRepeatedSfixed32(209);
      message.addRepeatedSfixed64(210);
      message.addRepeatedFloat   (211);
      message.addRepeatedDouble  (212);
      message.addRepeatedBool    (true);
      message.addRepeatedString  ("215");
      message.addRepeatedBytes   (toBytes("216"));
  
      message.addRepeatedGroup(
        TestAllTypes.RepeatedGroup.newBuilder().setA(217).build());
      message.addRepeatedNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(218).build());
      message.addRepeatedForeignMessage(
        ForeignMessage.newBuilder().setC(219).build());
      message.addRepeatedImportMessage(
        ImportMessage.newBuilder().setD(220).build());
      message.addRepeatedLazyMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(227).build());
  
      message.addRepeatedNestedEnum (TestAllTypes.NestedEnum.BAR);
      message.addRepeatedForeignEnum(ForeignEnum.FOREIGN_BAR);
      message.addRepeatedImportEnum (ImportEnum.IMPORT_BAR);
  
      message.addRepeatedStringPiece("224");
      message.addRepeatedCord("225");
  
      // Add a second one of each field.
      message.addRepeatedInt32   (301);
      message.addRepeatedInt64   (302);
      message.addRepeatedUint32  (303);
      message.addRepeatedUint64  (304);
      message.addRepeatedSint32  (305);
      message.addRepeatedSint64  (306);
      message.addRepeatedFixed32 (307);
      message.addRepeatedFixed64 (308);
      message.addRepeatedSfixed32(309);
      message.addRepeatedSfixed64(310);
      message.addRepeatedFloat   (311);
      message.addRepeatedDouble  (312);
      message.addRepeatedBool    (false);
      message.addRepeatedString  ("315");
      message.addRepeatedBytes   (toBytes("316"));
  
      message.addRepeatedGroup(
        TestAllTypes.RepeatedGroup.newBuilder().setA(317).build());
      message.addRepeatedNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(318).build());
      message.addRepeatedForeignMessage(
        ForeignMessage.newBuilder().setC(319).build());
      message.addRepeatedImportMessage(
        ImportMessage.newBuilder().setD(320).build());
      message.addRepeatedLazyMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(327).build());
  
      message.addRepeatedNestedEnum (TestAllTypes.NestedEnum.BAZ);
      message.addRepeatedForeignEnum(ForeignEnum.FOREIGN_BAZ);
      message.addRepeatedImportEnum (ImportEnum.IMPORT_BAZ);
  
      message.addRepeatedStringPiece("324");
      message.addRepeatedCord("325");
  
      // -----------------------------------------------------------------
  
      message.setDefaultInt32   (401);
      message.setDefaultInt64   (402);
      message.setDefaultUint32  (403);
      message.setDefaultUint64  (404);
      message.setDefaultSint32  (405);
      message.setDefaultSint64  (406);
      message.setDefaultFixed32 (407);
      message.setDefaultFixed64 (408);
      message.setDefaultSfixed32(409);
      message.setDefaultSfixed64(410);
      message.setDefaultFloat   (411);
      message.setDefaultDouble  (412);
      message.setDefaultBool    (false);
      message.setDefaultString  ("415");
      message.setDefaultBytes   (toBytes("416"));
  
      message.setDefaultNestedEnum (TestAllTypes.NestedEnum.FOO);
      message.setDefaultForeignEnum(ForeignEnum.FOREIGN_FOO);
      message.setDefaultImportEnum (ImportEnum.IMPORT_FOO);
  
      message.setDefaultStringPiece("424");
      message.setDefaultCord("425");
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Modify the repeated fields of {@code message} to contain the values
     * expected by {@code assertRepeatedFieldsModified()}.
     */
    public static void modifyRepeatedFields(TestAllTypes.Builder message) {
      message.setRepeatedInt32   (1, 501);
      message.setRepeatedInt64   (1, 502);
      message.setRepeatedUint32  (1, 503);
      message.setRepeatedUint64  (1, 504);
      message.setRepeatedSint32  (1, 505);
      message.setRepeatedSint64  (1, 506);
      message.setRepeatedFixed32 (1, 507);
      message.setRepeatedFixed64 (1, 508);
      message.setRepeatedSfixed32(1, 509);
      message.setRepeatedSfixed64(1, 510);
      message.setRepeatedFloat   (1, 511);
      message.setRepeatedDouble  (1, 512);
      message.setRepeatedBool    (1, true);
      message.setRepeatedString  (1, "515");
      message.setRepeatedBytes   (1, toBytes("516"));
  
      message.setRepeatedGroup(1,
        TestAllTypes.RepeatedGroup.newBuilder().setA(517).build());
      message.setRepeatedNestedMessage(1,
        TestAllTypes.NestedMessage.newBuilder().setBb(518).build());
      message.setRepeatedForeignMessage(1,
        ForeignMessage.newBuilder().setC(519).build());
      message.setRepeatedImportMessage(1,
        ImportMessage.newBuilder().setD(520).build());
      message.setRepeatedLazyMessage(1,
        TestAllTypes.NestedMessage.newBuilder().setBb(527).build());
  
      message.setRepeatedNestedEnum (1, TestAllTypes.NestedEnum.FOO);
      message.setRepeatedForeignEnum(1, ForeignEnum.FOREIGN_FOO);
      message.setRepeatedImportEnum (1, ImportEnum.IMPORT_FOO);
  
      message.setRepeatedStringPiece(1, "524");
      message.setRepeatedCord(1, "525");
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setAllFields}.
     */
    public static void assertAllFieldsSet(TestAllTypesOrBuilder message) {
      Assert.assertTrue(message.hasOptionalInt32   ());
      Assert.assertTrue(message.hasOptionalInt64   ());
      Assert.assertTrue(message.hasOptionalUint32  ());
      Assert.assertTrue(message.hasOptionalUint64  ());
      Assert.assertTrue(message.hasOptionalSint32  ());
      Assert.assertTrue(message.hasOptionalSint64  ());
      Assert.assertTrue(message.hasOptionalFixed32 ());
      Assert.assertTrue(message.hasOptionalFixed64 ());
      Assert.assertTrue(message.hasOptionalSfixed32());
      Assert.assertTrue(message.hasOptionalSfixed64());
      Assert.assertTrue(message.hasOptionalFloat   ());
      Assert.assertTrue(message.hasOptionalDouble  ());
      Assert.assertTrue(message.hasOptionalBool    ());
      Assert.assertTrue(message.hasOptionalString  ());
      Assert.assertTrue(message.hasOptionalBytes   ());
  
      Assert.assertTrue(message.hasOptionalGroup         ());
      Assert.assertTrue(message.hasOptionalNestedMessage ());
      Assert.assertTrue(message.hasOptionalForeignMessage());
      Assert.assertTrue(message.hasOptionalImportMessage ());
  
      Assert.assertTrue(message.getOptionalGroup         ().hasA());
      Assert.assertTrue(message.getOptionalNestedMessage ().hasBb());
      Assert.assertTrue(message.getOptionalForeignMessage().hasC());
      Assert.assertTrue(message.getOptionalImportMessage ().hasD());
  
      Assert.assertTrue(message.hasOptionalNestedEnum ());
      Assert.assertTrue(message.hasOptionalForeignEnum());
      Assert.assertTrue(message.hasOptionalImportEnum ());
  
      Assert.assertTrue(message.hasOptionalStringPiece());
      Assert.assertTrue(message.hasOptionalCord());
  
      Assert.assertEquals(101  , message.getOptionalInt32   ());
      Assert.assertEquals(102  , message.getOptionalInt64   ());
      Assert.assertEquals(103  , message.getOptionalUint32  ());
      Assert.assertEquals(104  , message.getOptionalUint64  ());
      Assert.assertEquals(105  , message.getOptionalSint32  ());
      Assert.assertEquals(106  , message.getOptionalSint64  ());
      Assert.assertEquals(107  , message.getOptionalFixed32 ());
      Assert.assertEquals(108  , message.getOptionalFixed64 ());
      Assert.assertEquals(109  , message.getOptionalSfixed32());
      Assert.assertEquals(110  , message.getOptionalSfixed64());
      Assert.assertEquals(111  , message.getOptionalFloat   (), 0.0);
      Assert.assertEquals(112  , message.getOptionalDouble  (), 0.0);
      Assert.assertEquals(true , message.getOptionalBool    ());
      Assert.assertEquals("115", message.getOptionalString  ());
      Assert.assertEquals(toBytes("116"), message.getOptionalBytes());
  
      Assert.assertEquals(117, message.getOptionalGroup              ().getA());
      Assert.assertEquals(118, message.getOptionalNestedMessage      ().getBb());
      Assert.assertEquals(119, message.getOptionalForeignMessage     ().getC());
      Assert.assertEquals(120, message.getOptionalImportMessage      ().getD());
      Assert.assertEquals(126, message.getOptionalPublicImportMessage().getE());
      Assert.assertEquals(127, message.getOptionalLazyMessage        ().getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAZ, message.getOptionalNestedEnum());
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getOptionalForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_BAZ, message.getOptionalImportEnum());
  
      Assert.assertEquals("124", message.getOptionalStringPiece());
      Assert.assertEquals("125", message.getOptionalCord());
  
      // -----------------------------------------------------------------
  
      Assert.assertEquals(2, message.getRepeatedInt32Count   ());
      Assert.assertEquals(2, message.getRepeatedInt64Count   ());
      Assert.assertEquals(2, message.getRepeatedUint32Count  ());
      Assert.assertEquals(2, message.getRepeatedUint64Count  ());
      Assert.assertEquals(2, message.getRepeatedSint32Count  ());
      Assert.assertEquals(2, message.getRepeatedSint64Count  ());
      Assert.assertEquals(2, message.getRepeatedFixed32Count ());
      Assert.assertEquals(2, message.getRepeatedFixed64Count ());
      Assert.assertEquals(2, message.getRepeatedSfixed32Count());
      Assert.assertEquals(2, message.getRepeatedSfixed64Count());
      Assert.assertEquals(2, message.getRepeatedFloatCount   ());
      Assert.assertEquals(2, message.getRepeatedDoubleCount  ());
      Assert.assertEquals(2, message.getRepeatedBoolCount    ());
      Assert.assertEquals(2, message.getRepeatedStringCount  ());
      Assert.assertEquals(2, message.getRepeatedBytesCount   ());
  
      Assert.assertEquals(2, message.getRepeatedGroupCount         ());
      Assert.assertEquals(2, message.getRepeatedNestedMessageCount ());
      Assert.assertEquals(2, message.getRepeatedForeignMessageCount());
      Assert.assertEquals(2, message.getRepeatedImportMessageCount ());
      Assert.assertEquals(2, message.getRepeatedLazyMessageCount   ());
      Assert.assertEquals(2, message.getRepeatedNestedEnumCount    ());
      Assert.assertEquals(2, message.getRepeatedForeignEnumCount   ());
      Assert.assertEquals(2, message.getRepeatedImportEnumCount    ());
  
      Assert.assertEquals(2, message.getRepeatedStringPieceCount());
      Assert.assertEquals(2, message.getRepeatedCordCount());
  
      Assert.assertEquals(201  , message.getRepeatedInt32   (0));
      Assert.assertEquals(202  , message.getRepeatedInt64   (0));
      Assert.assertEquals(203  , message.getRepeatedUint32  (0));
      Assert.assertEquals(204  , message.getRepeatedUint64  (0));
      Assert.assertEquals(205  , message.getRepeatedSint32  (0));
      Assert.assertEquals(206  , message.getRepeatedSint64  (0));
      Assert.assertEquals(207  , message.getRepeatedFixed32 (0));
      Assert.assertEquals(208  , message.getRepeatedFixed64 (0));
      Assert.assertEquals(209  , message.getRepeatedSfixed32(0));
      Assert.assertEquals(210  , message.getRepeatedSfixed64(0));
      Assert.assertEquals(211  , message.getRepeatedFloat   (0), 0.0);
      Assert.assertEquals(212  , message.getRepeatedDouble  (0), 0.0);
      Assert.assertEquals(true , message.getRepeatedBool    (0));
      Assert.assertEquals("215", message.getRepeatedString  (0));
      Assert.assertEquals(toBytes("216"), message.getRepeatedBytes(0));
  
      Assert.assertEquals(217, message.getRepeatedGroup         (0).getA());
      Assert.assertEquals(218, message.getRepeatedNestedMessage (0).getBb());
      Assert.assertEquals(219, message.getRepeatedForeignMessage(0).getC());
      Assert.assertEquals(220, message.getRepeatedImportMessage (0).getD());
      Assert.assertEquals(227, message.getRepeatedLazyMessage   (0).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAR, message.getRepeatedNestedEnum (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getRepeatedForeignEnum(0));
      Assert.assertEquals(ImportEnum.IMPORT_BAR, message.getRepeatedImportEnum(0));
  
      Assert.assertEquals("224", message.getRepeatedStringPiece(0));
      Assert.assertEquals("225", message.getRepeatedCord(0));
  
      Assert.assertEquals(301  , message.getRepeatedInt32   (1));
      Assert.assertEquals(302  , message.getRepeatedInt64   (1));
      Assert.assertEquals(303  , message.getRepeatedUint32  (1));
      Assert.assertEquals(304  , message.getRepeatedUint64  (1));
      Assert.assertEquals(305  , message.getRepeatedSint32  (1));
      Assert.assertEquals(306  , message.getRepeatedSint64  (1));
      Assert.assertEquals(307  , message.getRepeatedFixed32 (1));
      Assert.assertEquals(308  , message.getRepeatedFixed64 (1));
      Assert.assertEquals(309  , message.getRepeatedSfixed32(1));
      Assert.assertEquals(310  , message.getRepeatedSfixed64(1));
      Assert.assertEquals(311  , message.getRepeatedFloat   (1), 0.0);
      Assert.assertEquals(312  , message.getRepeatedDouble  (1), 0.0);
      Assert.assertEquals(false, message.getRepeatedBool    (1));
      Assert.assertEquals("315", message.getRepeatedString  (1));
      Assert.assertEquals(toBytes("316"), message.getRepeatedBytes(1));
  
      Assert.assertEquals(317, message.getRepeatedGroup         (1).getA());
      Assert.assertEquals(318, message.getRepeatedNestedMessage (1).getBb());
      Assert.assertEquals(319, message.getRepeatedForeignMessage(1).getC());
      Assert.assertEquals(320, message.getRepeatedImportMessage (1).getD());
      Assert.assertEquals(327, message.getRepeatedLazyMessage   (1).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAZ, message.getRepeatedNestedEnum (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getRepeatedForeignEnum(1));
      Assert.assertEquals(ImportEnum.IMPORT_BAZ, message.getRepeatedImportEnum(1));
  
      Assert.assertEquals("324", message.getRepeatedStringPiece(1));
      Assert.assertEquals("325", message.getRepeatedCord(1));
  
      // -----------------------------------------------------------------
  
      Assert.assertTrue(message.hasDefaultInt32   ());
      Assert.assertTrue(message.hasDefaultInt64   ());
      Assert.assertTrue(message.hasDefaultUint32  ());
      Assert.assertTrue(message.hasDefaultUint64  ());
      Assert.assertTrue(message.hasDefaultSint32  ());
      Assert.assertTrue(message.hasDefaultSint64  ());
      Assert.assertTrue(message.hasDefaultFixed32 ());
      Assert.assertTrue(message.hasDefaultFixed64 ());
      Assert.assertTrue(message.hasDefaultSfixed32());
      Assert.assertTrue(message.hasDefaultSfixed64());
      Assert.assertTrue(message.hasDefaultFloat   ());
      Assert.assertTrue(message.hasDefaultDouble  ());
      Assert.assertTrue(message.hasDefaultBool    ());
      Assert.assertTrue(message.hasDefaultString  ());
      Assert.assertTrue(message.hasDefaultBytes   ());
  
      Assert.assertTrue(message.hasDefaultNestedEnum ());
      Assert.assertTrue(message.hasDefaultForeignEnum());
      Assert.assertTrue(message.hasDefaultImportEnum ());
  
      Assert.assertTrue(message.hasDefaultStringPiece());
      Assert.assertTrue(message.hasDefaultCord());
  
      Assert.assertEquals(401  , message.getDefaultInt32   ());
      Assert.assertEquals(402  , message.getDefaultInt64   ());
      Assert.assertEquals(403  , message.getDefaultUint32  ());
      Assert.assertEquals(404  , message.getDefaultUint64  ());
      Assert.assertEquals(405  , message.getDefaultSint32  ());
      Assert.assertEquals(406  , message.getDefaultSint64  ());
      Assert.assertEquals(407  , message.getDefaultFixed32 ());
      Assert.assertEquals(408  , message.getDefaultFixed64 ());
      Assert.assertEquals(409  , message.getDefaultSfixed32());
      Assert.assertEquals(410  , message.getDefaultSfixed64());
      Assert.assertEquals(411  , message.getDefaultFloat   (), 0.0);
      Assert.assertEquals(412  , message.getDefaultDouble  (), 0.0);
      Assert.assertEquals(false, message.getDefaultBool    ());
      Assert.assertEquals("415", message.getDefaultString  ());
      Assert.assertEquals(toBytes("416"), message.getDefaultBytes());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.FOO, message.getDefaultNestedEnum ());
      Assert.assertEquals(ForeignEnum.FOREIGN_FOO, message.getDefaultForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_FOO, message.getDefaultImportEnum());
  
      Assert.assertEquals("424", message.getDefaultStringPiece());
      Assert.assertEquals("425", message.getDefaultCord());
    }
  
    // -------------------------------------------------------------------
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are cleared, and that getting the fields returns their
     * default values.
     */
    public static void assertClear(TestAllTypesOrBuilder message) {
      // hasBlah() should initially be false for all optional fields.
      Assert.assertFalse(message.hasOptionalInt32   ());
      Assert.assertFalse(message.hasOptionalInt64   ());
      Assert.assertFalse(message.hasOptionalUint32  ());
      Assert.assertFalse(message.hasOptionalUint64  ());
      Assert.assertFalse(message.hasOptionalSint32  ());
      Assert.assertFalse(message.hasOptionalSint64  ());
      Assert.assertFalse(message.hasOptionalFixed32 ());
      Assert.assertFalse(message.hasOptionalFixed64 ());
      Assert.assertFalse(message.hasOptionalSfixed32());
      Assert.assertFalse(message.hasOptionalSfixed64());
      Assert.assertFalse(message.hasOptionalFloat   ());
      Assert.assertFalse(message.hasOptionalDouble  ());
      Assert.assertFalse(message.hasOptionalBool    ());
      Assert.assertFalse(message.hasOptionalString  ());
      Assert.assertFalse(message.hasOptionalBytes   ());
  
      Assert.assertFalse(message.hasOptionalGroup         ());
      Assert.assertFalse(message.hasOptionalNestedMessage ());
      Assert.assertFalse(message.hasOptionalForeignMessage());
      Assert.assertFalse(message.hasOptionalImportMessage ());
  
      Assert.assertFalse(message.hasOptionalNestedEnum ());
      Assert.assertFalse(message.hasOptionalForeignEnum());
      Assert.assertFalse(message.hasOptionalImportEnum ());
  
      Assert.assertFalse(message.hasOptionalStringPiece());
      Assert.assertFalse(message.hasOptionalCord());
  
      // Optional fields without defaults are set to zero or something like it.
      Assert.assertEquals(0    , message.getOptionalInt32   ());
      Assert.assertEquals(0    , message.getOptionalInt64   ());
      Assert.assertEquals(0    , message.getOptionalUint32  ());
      Assert.assertEquals(0    , message.getOptionalUint64  ());
      Assert.assertEquals(0    , message.getOptionalSint32  ());
      Assert.assertEquals(0    , message.getOptionalSint64  ());
      Assert.assertEquals(0    , message.getOptionalFixed32 ());
      Assert.assertEquals(0    , message.getOptionalFixed64 ());
      Assert.assertEquals(0    , message.getOptionalSfixed32());
      Assert.assertEquals(0    , message.getOptionalSfixed64());
      Assert.assertEquals(0    , message.getOptionalFloat   (), 0.0);
      Assert.assertEquals(0    , message.getOptionalDouble  (), 0.0);
      Assert.assertEquals(false, message.getOptionalBool    ());
      Assert.assertEquals(""   , message.getOptionalString  ());
      Assert.assertEquals(ByteString.EMPTY, message.getOptionalBytes());
  
      // Embedded messages should also be clear.
      Assert.assertFalse(message.getOptionalGroup              ().hasA());
      Assert.assertFalse(message.getOptionalNestedMessage      ().hasBb());
      Assert.assertFalse(message.getOptionalForeignMessage     ().hasC());
      Assert.assertFalse(message.getOptionalImportMessage      ().hasD());
      Assert.assertFalse(message.getOptionalPublicImportMessage().hasE());
      Assert.assertFalse(message.getOptionalLazyMessage        ().hasBb());
  
      Assert.assertEquals(0, message.getOptionalGroup              ().getA());
      Assert.assertEquals(0, message.getOptionalNestedMessage      ().getBb());
      Assert.assertEquals(0, message.getOptionalForeignMessage     ().getC());
      Assert.assertEquals(0, message.getOptionalImportMessage      ().getD());
      Assert.assertEquals(0, message.getOptionalPublicImportMessage().getE());
      Assert.assertEquals(0, message.getOptionalLazyMessage        ().getBb());
  
      // Enums without defaults are set to the first value in the enum.
      Assert.assertEquals(TestAllTypes.NestedEnum.FOO, message.getOptionalNestedEnum ());
      Assert.assertEquals(ForeignEnum.FOREIGN_FOO, message.getOptionalForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_FOO, message.getOptionalImportEnum());
  
      Assert.assertEquals("", message.getOptionalStringPiece());
      Assert.assertEquals("", message.getOptionalCord());
  
      // Repeated fields are empty.
      Assert.assertEquals(0, message.getRepeatedInt32Count   ());
      Assert.assertEquals(0, message.getRepeatedInt64Count   ());
      Assert.assertEquals(0, message.getRepeatedUint32Count  ());
      Assert.assertEquals(0, message.getRepeatedUint64Count  ());
      Assert.assertEquals(0, message.getRepeatedSint32Count  ());
      Assert.assertEquals(0, message.getRepeatedSint64Count  ());
      Assert.assertEquals(0, message.getRepeatedFixed32Count ());
      Assert.assertEquals(0, message.getRepeatedFixed64Count ());
      Assert.assertEquals(0, message.getRepeatedSfixed32Count());
      Assert.assertEquals(0, message.getRepeatedSfixed64Count());
      Assert.assertEquals(0, message.getRepeatedFloatCount   ());
      Assert.assertEquals(0, message.getRepeatedDoubleCount  ());
      Assert.assertEquals(0, message.getRepeatedBoolCount    ());
      Assert.assertEquals(0, message.getRepeatedStringCount  ());
      Assert.assertEquals(0, message.getRepeatedBytesCount   ());
  
      Assert.assertEquals(0, message.getRepeatedGroupCount         ());
      Assert.assertEquals(0, message.getRepeatedNestedMessageCount ());
      Assert.assertEquals(0, message.getRepeatedForeignMessageCount());
      Assert.assertEquals(0, message.getRepeatedImportMessageCount ());
      Assert.assertEquals(0, message.getRepeatedLazyMessageCount   ());
      Assert.assertEquals(0, message.getRepeatedNestedEnumCount    ());
      Assert.assertEquals(0, message.getRepeatedForeignEnumCount   ());
      Assert.assertEquals(0, message.getRepeatedImportEnumCount    ());
  
      Assert.assertEquals(0, message.getRepeatedStringPieceCount());
      Assert.assertEquals(0, message.getRepeatedCordCount());
  
      // hasBlah() should also be false for all default fields.
      Assert.assertFalse(message.hasDefaultInt32   ());
      Assert.assertFalse(message.hasDefaultInt64   ());
      Assert.assertFalse(message.hasDefaultUint32  ());
      Assert.assertFalse(message.hasDefaultUint64  ());
      Assert.assertFalse(message.hasDefaultSint32  ());
      Assert.assertFalse(message.hasDefaultSint64  ());
      Assert.assertFalse(message.hasDefaultFixed32 ());
      Assert.assertFalse(message.hasDefaultFixed64 ());
      Assert.assertFalse(message.hasDefaultSfixed32());
      Assert.assertFalse(message.hasDefaultSfixed64());
      Assert.assertFalse(message.hasDefaultFloat   ());
      Assert.assertFalse(message.hasDefaultDouble  ());
      Assert.assertFalse(message.hasDefaultBool    ());
      Assert.assertFalse(message.hasDefaultString  ());
      Assert.assertFalse(message.hasDefaultBytes   ());
  
      Assert.assertFalse(message.hasDefaultNestedEnum ());
      Assert.assertFalse(message.hasDefaultForeignEnum());
      Assert.assertFalse(message.hasDefaultImportEnum ());
  
      Assert.assertFalse(message.hasDefaultStringPiece());
      Assert.assertFalse(message.hasDefaultCord());
  
      // Fields with defaults have their default values (duh).
      Assert.assertEquals( 41    , message.getDefaultInt32   ());
      Assert.assertEquals( 42    , message.getDefaultInt64   ());
      Assert.assertEquals( 43    , message.getDefaultUint32  ());
      Assert.assertEquals( 44    , message.getDefaultUint64  ());
      Assert.assertEquals(-45    , message.getDefaultSint32  ());
      Assert.assertEquals( 46    , message.getDefaultSint64  ());
      Assert.assertEquals( 47    , message.getDefaultFixed32 ());
      Assert.assertEquals( 48    , message.getDefaultFixed64 ());
      Assert.assertEquals( 49    , message.getDefaultSfixed32());
      Assert.assertEquals(-50    , message.getDefaultSfixed64());
      Assert.assertEquals( 51.5  , message.getDefaultFloat   (), 0.0);
      Assert.assertEquals( 52e3  , message.getDefaultDouble  (), 0.0);
      Assert.assertEquals(true   , message.getDefaultBool    ());
      Assert.assertEquals("hello", message.getDefaultString  ());
      Assert.assertEquals(toBytes("world"), message.getDefaultBytes());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAR, message.getDefaultNestedEnum ());
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getDefaultForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_BAR, message.getDefaultImportEnum());
  
      Assert.assertEquals("abc", message.getDefaultStringPiece());
      Assert.assertEquals("123", message.getDefaultCord());
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setAllFields}
     * followed by {@code modifyRepeatedFields}.
     */
    public static void assertRepeatedFieldsModified(
        TestAllTypesOrBuilder message) {
      // ModifyRepeatedFields only sets the second repeated element of each
      // field.  In addition to verifying this, we also verify that the first
      // element and size were *not* modified.
      Assert.assertEquals(2, message.getRepeatedInt32Count   ());
      Assert.assertEquals(2, message.getRepeatedInt64Count   ());
      Assert.assertEquals(2, message.getRepeatedUint32Count  ());
      Assert.assertEquals(2, message.getRepeatedUint64Count  ());
      Assert.assertEquals(2, message.getRepeatedSint32Count  ());
      Assert.assertEquals(2, message.getRepeatedSint64Count  ());
      Assert.assertEquals(2, message.getRepeatedFixed32Count ());
      Assert.assertEquals(2, message.getRepeatedFixed64Count ());
      Assert.assertEquals(2, message.getRepeatedSfixed32Count());
      Assert.assertEquals(2, message.getRepeatedSfixed64Count());
      Assert.assertEquals(2, message.getRepeatedFloatCount   ());
      Assert.assertEquals(2, message.getRepeatedDoubleCount  ());
      Assert.assertEquals(2, message.getRepeatedBoolCount    ());
      Assert.assertEquals(2, message.getRepeatedStringCount  ());
      Assert.assertEquals(2, message.getRepeatedBytesCount   ());
  
      Assert.assertEquals(2, message.getRepeatedGroupCount         ());
      Assert.assertEquals(2, message.getRepeatedNestedMessageCount ());
      Assert.assertEquals(2, message.getRepeatedForeignMessageCount());
      Assert.assertEquals(2, message.getRepeatedImportMessageCount ());
      Assert.assertEquals(2, message.getRepeatedLazyMessageCount   ());
      Assert.assertEquals(2, message.getRepeatedNestedEnumCount    ());
      Assert.assertEquals(2, message.getRepeatedForeignEnumCount   ());
      Assert.assertEquals(2, message.getRepeatedImportEnumCount    ());
  
      Assert.assertEquals(2, message.getRepeatedStringPieceCount());
      Assert.assertEquals(2, message.getRepeatedCordCount());
  
      Assert.assertEquals(201  , message.getRepeatedInt32   (0));
      Assert.assertEquals(202L , message.getRepeatedInt64   (0));
      Assert.assertEquals(203  , message.getRepeatedUint32  (0));
      Assert.assertEquals(204L , message.getRepeatedUint64  (0));
      Assert.assertEquals(205  , message.getRepeatedSint32  (0));
      Assert.assertEquals(206L , message.getRepeatedSint64  (0));
      Assert.assertEquals(207  , message.getRepeatedFixed32 (0));
      Assert.assertEquals(208L , message.getRepeatedFixed64 (0));
      Assert.assertEquals(209  , message.getRepeatedSfixed32(0));
      Assert.assertEquals(210L , message.getRepeatedSfixed64(0));
      Assert.assertEquals(211F , message.getRepeatedFloat   (0));
      Assert.assertEquals(212D , message.getRepeatedDouble  (0));
      Assert.assertEquals(true , message.getRepeatedBool    (0));
      Assert.assertEquals("215", message.getRepeatedString  (0));
      Assert.assertEquals(toBytes("216"), message.getRepeatedBytes(0));
  
      Assert.assertEquals(217, message.getRepeatedGroup         (0).getA());
      Assert.assertEquals(218, message.getRepeatedNestedMessage (0).getBb());
      Assert.assertEquals(219, message.getRepeatedForeignMessage(0).getC());
      Assert.assertEquals(220, message.getRepeatedImportMessage (0).getD());
      Assert.assertEquals(227, message.getRepeatedLazyMessage   (0).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAR, message.getRepeatedNestedEnum (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getRepeatedForeignEnum(0));
      Assert.assertEquals(ImportEnum.IMPORT_BAR, message.getRepeatedImportEnum(0));
  
      Assert.assertEquals("224", message.getRepeatedStringPiece(0));
      Assert.assertEquals("225", message.getRepeatedCord(0));
  
      // Actually verify the second (modified) elements now.
      Assert.assertEquals(501  , message.getRepeatedInt32   (1));
      Assert.assertEquals(502L , message.getRepeatedInt64   (1));
      Assert.assertEquals(503  , message.getRepeatedUint32  (1));
      Assert.assertEquals(504L , message.getRepeatedUint64  (1));
      Assert.assertEquals(505  , message.getRepeatedSint32  (1));
      Assert.assertEquals(506L , message.getRepeatedSint64  (1));
      Assert.assertEquals(507  , message.getRepeatedFixed32 (1));
      Assert.assertEquals(508L , message.getRepeatedFixed64 (1));
      Assert.assertEquals(509  , message.getRepeatedSfixed32(1));
      Assert.assertEquals(510L , message.getRepeatedSfixed64(1));
      Assert.assertEquals(511F , message.getRepeatedFloat   (1));
      Assert.assertEquals(512D , message.getRepeatedDouble  (1));
      Assert.assertEquals(true , message.getRepeatedBool    (1));
      Assert.assertEquals("515", message.getRepeatedString  (1));
      Assert.assertEquals(toBytes("516"), message.getRepeatedBytes(1));
  
      Assert.assertEquals(517, message.getRepeatedGroup         (1).getA());
      Assert.assertEquals(518, message.getRepeatedNestedMessage (1).getBb());
      Assert.assertEquals(519, message.getRepeatedForeignMessage(1).getC());
      Assert.assertEquals(520, message.getRepeatedImportMessage (1).getD());
      Assert.assertEquals(527, message.getRepeatedLazyMessage   (1).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.FOO, message.getRepeatedNestedEnum (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_FOO, message.getRepeatedForeignEnum(1));
      Assert.assertEquals(ImportEnum.IMPORT_FOO, message.getRepeatedImportEnum(1));
  
      Assert.assertEquals("524", message.getRepeatedStringPiece(1));
      Assert.assertEquals("525", message.getRepeatedCord(1));
    }
  
    /**
     * Set every field of {@code message} to a unique value.
     */
    public static void setPackedFields(TestPackedTypes.Builder message) {
      message.addPackedInt32   (601);
      message.addPackedInt64   (602);
      message.addPackedUint32  (603);
      message.addPackedUint64  (604);
      message.addPackedSint32  (605);
      message.addPackedSint64  (606);
      message.addPackedFixed32 (607);
      message.addPackedFixed64 (608);
      message.addPackedSfixed32(609);
      message.addPackedSfixed64(610);
      message.addPackedFloat   (611);
      message.addPackedDouble  (612);
      message.addPackedBool    (true);
      message.addPackedEnum    (ForeignEnum.FOREIGN_BAR);
      // Add a second one of each field.
      message.addPackedInt32   (701);
      message.addPackedInt64   (702);
      message.addPackedUint32  (703);
      message.addPackedUint64  (704);
      message.addPackedSint32  (705);
      message.addPackedSint64  (706);
      message.addPackedFixed32 (707);
      message.addPackedFixed64 (708);
      message.addPackedSfixed32(709);
      message.addPackedSfixed64(710);
      message.addPackedFloat   (711);
      message.addPackedDouble  (712);
      message.addPackedBool    (false);
      message.addPackedEnum    (ForeignEnum.FOREIGN_BAZ);
    }
  
    /**
     * Set every field of {@code message} to a unique value. Must correspond with
     * the values applied by {@code setPackedFields}.
     */
    public static void setUnpackedFields(TestUnpackedTypes.Builder message) {
      message.addUnpackedInt32   (601);
      message.addUnpackedInt64   (602);
      message.addUnpackedUint32  (603);
      message.addUnpackedUint64  (604);
      message.addUnpackedSint32  (605);
      message.addUnpackedSint64  (606);
      message.addUnpackedFixed32 (607);
      message.addUnpackedFixed64 (608);
      message.addUnpackedSfixed32(609);
      message.addUnpackedSfixed64(610);
      message.addUnpackedFloat   (611);
      message.addUnpackedDouble  (612);
      message.addUnpackedBool    (true);
      message.addUnpackedEnum    (ForeignEnum.FOREIGN_BAR);
      // Add a second one of each field.
      message.addUnpackedInt32   (701);
      message.addUnpackedInt64   (702);
      message.addUnpackedUint32  (703);
      message.addUnpackedUint64  (704);
      message.addUnpackedSint32  (705);
      message.addUnpackedSint64  (706);
      message.addUnpackedFixed32 (707);
      message.addUnpackedFixed64 (708);
      message.addUnpackedSfixed32(709);
      message.addUnpackedSfixed64(710);
      message.addUnpackedFloat   (711);
      message.addUnpackedDouble  (712);
      message.addUnpackedBool    (false);
      message.addUnpackedEnum    (ForeignEnum.FOREIGN_BAZ);
    }
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setPackedFields}.
     */
    public static void assertPackedFieldsSet(TestPackedTypes message) {
      Assert.assertEquals(2, message.getPackedInt32Count   ());
      Assert.assertEquals(2, message.getPackedInt64Count   ());
      Assert.assertEquals(2, message.getPackedUint32Count  ());
      Assert.assertEquals(2, message.getPackedUint64Count  ());
      Assert.assertEquals(2, message.getPackedSint32Count  ());
      Assert.assertEquals(2, message.getPackedSint64Count  ());
      Assert.assertEquals(2, message.getPackedFixed32Count ());
      Assert.assertEquals(2, message.getPackedFixed64Count ());
      Assert.assertEquals(2, message.getPackedSfixed32Count());
      Assert.assertEquals(2, message.getPackedSfixed64Count());
      Assert.assertEquals(2, message.getPackedFloatCount   ());
      Assert.assertEquals(2, message.getPackedDoubleCount  ());
      Assert.assertEquals(2, message.getPackedBoolCount    ());
      Assert.assertEquals(2, message.getPackedEnumCount   ());
      Assert.assertEquals(601  , message.getPackedInt32   (0));
      Assert.assertEquals(602  , message.getPackedInt64   (0));
      Assert.assertEquals(603  , message.getPackedUint32  (0));
      Assert.assertEquals(604  , message.getPackedUint64  (0));
      Assert.assertEquals(605  , message.getPackedSint32  (0));
      Assert.assertEquals(606  , message.getPackedSint64  (0));
      Assert.assertEquals(607  , message.getPackedFixed32 (0));
      Assert.assertEquals(608  , message.getPackedFixed64 (0));
      Assert.assertEquals(609  , message.getPackedSfixed32(0));
      Assert.assertEquals(610  , message.getPackedSfixed64(0));
      Assert.assertEquals(611  , message.getPackedFloat   (0), 0.0);
      Assert.assertEquals(612  , message.getPackedDouble  (0), 0.0);
      Assert.assertEquals(true , message.getPackedBool    (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getPackedEnum(0));
      Assert.assertEquals(701  , message.getPackedInt32   (1));
      Assert.assertEquals(702  , message.getPackedInt64   (1));
      Assert.assertEquals(703  , message.getPackedUint32  (1));
      Assert.assertEquals(704  , message.getPackedUint64  (1));
      Assert.assertEquals(705  , message.getPackedSint32  (1));
      Assert.assertEquals(706  , message.getPackedSint64  (1));
      Assert.assertEquals(707  , message.getPackedFixed32 (1));
      Assert.assertEquals(708  , message.getPackedFixed64 (1));
      Assert.assertEquals(709  , message.getPackedSfixed32(1));
      Assert.assertEquals(710  , message.getPackedSfixed64(1));
      Assert.assertEquals(711  , message.getPackedFloat   (1), 0.0);
      Assert.assertEquals(712  , message.getPackedDouble  (1), 0.0);
      Assert.assertEquals(false, message.getPackedBool    (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getPackedEnum(1));
    }
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setUnpackedFields}.
     */
    public static void assertUnpackedFieldsSet(TestUnpackedTypes message) {
      Assert.assertEquals(2, message.getUnpackedInt32Count   ());
      Assert.assertEquals(2, message.getUnpackedInt64Count   ());
      Assert.assertEquals(2, message.getUnpackedUint32Count  ());
      Assert.assertEquals(2, message.getUnpackedUint64Count  ());
      Assert.assertEquals(2, message.getUnpackedSint32Count  ());
      Assert.assertEquals(2, message.getUnpackedSint64Count  ());
      Assert.assertEquals(2, message.getUnpackedFixed32Count ());
      Assert.assertEquals(2, message.getUnpackedFixed64Count ());
      Assert.assertEquals(2, message.getUnpackedSfixed32Count());
      Assert.assertEquals(2, message.getUnpackedSfixed64Count());
      Assert.assertEquals(2, message.getUnpackedFloatCount   ());
      Assert.assertEquals(2, message.getUnpackedDoubleCount  ());
      Assert.assertEquals(2, message.getUnpackedBoolCount    ());
      Assert.assertEquals(2, message.getUnpackedEnumCount   ());
      Assert.assertEquals(601  , message.getUnpackedInt32   (0));
      Assert.assertEquals(602  , message.getUnpackedInt64   (0));
      Assert.assertEquals(603  , message.getUnpackedUint32  (0));
      Assert.assertEquals(604  , message.getUnpackedUint64  (0));
      Assert.assertEquals(605  , message.getUnpackedSint32  (0));
      Assert.assertEquals(606  , message.getUnpackedSint64  (0));
      Assert.assertEquals(607  , message.getUnpackedFixed32 (0));
      Assert.assertEquals(608  , message.getUnpackedFixed64 (0));
      Assert.assertEquals(609  , message.getUnpackedSfixed32(0));
      Assert.assertEquals(610  , message.getUnpackedSfixed64(0));
      Assert.assertEquals(611  , message.getUnpackedFloat   (0), 0.0);
      Assert.assertEquals(612  , message.getUnpackedDouble  (0), 0.0);
      Assert.assertEquals(true , message.getUnpackedBool    (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getUnpackedEnum(0));
      Assert.assertEquals(701  , message.getUnpackedInt32   (1));
      Assert.assertEquals(702  , message.getUnpackedInt64   (1));
      Assert.assertEquals(703  , message.getUnpackedUint32  (1));
      Assert.assertEquals(704  , message.getUnpackedUint64  (1));
      Assert.assertEquals(705  , message.getUnpackedSint32  (1));
      Assert.assertEquals(706  , message.getUnpackedSint64  (1));
      Assert.assertEquals(707  , message.getUnpackedFixed32 (1));
      Assert.assertEquals(708  , message.getUnpackedFixed64 (1));
      Assert.assertEquals(709  , message.getUnpackedSfixed32(1));
      Assert.assertEquals(710  , message.getUnpackedSfixed64(1));
      Assert.assertEquals(711  , message.getUnpackedFloat   (1), 0.0);
      Assert.assertEquals(712  , message.getUnpackedDouble  (1), 0.0);
      Assert.assertEquals(false, message.getUnpackedBool    (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getUnpackedEnum(1));
    }
  
    // ===================================================================
    // Like above, but for extensions
  
    // Java gets confused with things like assertEquals(int, Integer):  it can't
    // decide whether to call assertEquals(int, int) or assertEquals(Object,
    // Object).  So we define these methods to help it.
    private static void assertEqualsExactType(int a, int b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(long a, long b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(float a, float b) {
      Assert.assertEquals(a, b, 0.0);
    }
    private static void assertEqualsExactType(double a, double b) {
      Assert.assertEquals(a, b, 0.0);
    }
    private static void assertEqualsExactType(boolean a, boolean b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(String a, String b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ByteString a, ByteString b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(TestAllTypes.NestedEnum a,
                                              TestAllTypes.NestedEnum b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ForeignEnum a, ForeignEnum b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ImportEnum a, ImportEnum b) {
      Assert.assertEquals(a, b);
    }
    /**
     * Get an unmodifiable {@link ExtensionRegistry} containing all the
     * extensions of {@code TestAllExtensions}.
     */
    public static ExtensionRegistry getExtensionRegistry() {
      ExtensionRegistry registry = ExtensionRegistry.newInstance();
      registerAllExtensions(registry);
      return registry.getUnmodifiable();
    }
  
  
    /**
     * Register all of {@code TestAllExtensions}'s extensions with the
     * given {@link ExtensionRegistry}.
     */
    public static void registerAllExtensions(ExtensionRegistry registry) {
      UnittestProto.registerAllExtensions(registry);
    }
  
  
    /**
     * Set every field of {@code message} to the values expected by
     * {@code assertAllExtensionsSet()}.
     */
    public static void setAllExtensions(TestAllExtensions.Builder message) {
      message.setExtension(optionalInt32Extension   , 101);
      message.setExtension(optionalInt64Extension   , 102L);
      message.setExtension(optionalUint32Extension  , 103);
      message.setExtension(optionalUint64Extension  , 104L);
      message.setExtension(optionalSint32Extension  , 105);
      message.setExtension(optionalSint64Extension  , 106L);
      message.setExtension(optionalFixed32Extension , 107);
      message.setExtension(optionalFixed64Extension , 108L);
      message.setExtension(optionalSfixed32Extension, 109);
      message.setExtension(optionalSfixed64Extension, 110L);
      message.setExtension(optionalFloatExtension   , 111F);
      message.setExtension(optionalDoubleExtension  , 112D);
      message.setExtension(optionalBoolExtension    , true);
      message.setExtension(optionalStringExtension  , "115");
      message.setExtension(optionalBytesExtension   , toBytes("116"));
  
      message.setExtension(optionalGroupExtension,
        OptionalGroup_extension.newBuilder().setA(117).build());
      message.setExtension(optionalNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(118).build());
      message.setExtension(optionalForeignMessageExtension,
        ForeignMessage.newBuilder().setC(119).build());
      message.setExtension(optionalImportMessageExtension,
        ImportMessage.newBuilder().setD(120).build());
      message.setExtension(optionalPublicImportMessageExtension,
        PublicImportMessage.newBuilder().setE(126).build());
      message.setExtension(optionalLazyMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(127).build());
  
      message.setExtension(optionalNestedEnumExtension, TestAllTypes.NestedEnum.BAZ);
      message.setExtension(optionalForeignEnumExtension, ForeignEnum.FOREIGN_BAZ);
      message.setExtension(optionalImportEnumExtension, ImportEnum.IMPORT_BAZ);
  
      message.setExtension(optionalStringPieceExtension, "124");
      message.setExtension(optionalCordExtension, "125");
  
      // -----------------------------------------------------------------
  
      message.addExtension(repeatedInt32Extension   , 201);
      message.addExtension(repeatedInt64Extension   , 202L);
      message.addExtension(repeatedUint32Extension  , 203);
      message.addExtension(repeatedUint64Extension  , 204L);
      message.addExtension(repeatedSint32Extension  , 205);
      message.addExtension(repeatedSint64Extension  , 206L);
      message.addExtension(repeatedFixed32Extension , 207);
      message.addExtension(repeatedFixed64Extension , 208L);
      message.addExtension(repeatedSfixed32Extension, 209);
      message.addExtension(repeatedSfixed64Extension, 210L);
      message.addExtension(repeatedFloatExtension   , 211F);
      message.addExtension(repeatedDoubleExtension  , 212D);
      message.addExtension(repeatedBoolExtension    , true);
      message.addExtension(repeatedStringExtension  , "215");
      message.addExtension(repeatedBytesExtension   , toBytes("216"));
  
      message.addExtension(repeatedGroupExtension,
        RepeatedGroup_extension.newBuilder().setA(217).build());
      message.addExtension(repeatedNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(218).build());
      message.addExtension(repeatedForeignMessageExtension,
        ForeignMessage.newBuilder().setC(219).build());
      message.addExtension(repeatedImportMessageExtension,
        ImportMessage.newBuilder().setD(220).build());
      message.addExtension(repeatedLazyMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(227).build());
  
      message.addExtension(repeatedNestedEnumExtension, TestAllTypes.NestedEnum.BAR);
      message.addExtension(repeatedForeignEnumExtension, ForeignEnum.FOREIGN_BAR);
      message.addExtension(repeatedImportEnumExtension, ImportEnum.IMPORT_BAR);
  
      message.addExtension(repeatedStringPieceExtension, "224");
      message.addExtension(repeatedCordExtension, "225");
  
      // Add a second one of each field.
      message.addExtension(repeatedInt32Extension   , 301);
      message.addExtension(repeatedInt64Extension   , 302L);
      message.addExtension(repeatedUint32Extension  , 303);
      message.addExtension(repeatedUint64Extension  , 304L);
      message.addExtension(repeatedSint32Extension  , 305);
      message.addExtension(repeatedSint64Extension  , 306L);
      message.addExtension(repeatedFixed32Extension , 307);
      message.addExtension(repeatedFixed64Extension , 308L);
      message.addExtension(repeatedSfixed32Extension, 309);
      message.addExtension(repeatedSfixed64Extension, 310L);
      message.addExtension(repeatedFloatExtension   , 311F);
      message.addExtension(repeatedDoubleExtension  , 312D);
      message.addExtension(repeatedBoolExtension    , false);
      message.addExtension(repeatedStringExtension  , "315");
      message.addExtension(repeatedBytesExtension   , toBytes("316"));
  
      message.addExtension(repeatedGroupExtension,
        RepeatedGroup_extension.newBuilder().setA(317).build());
      message.addExtension(repeatedNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(318).build());
      message.addExtension(repeatedForeignMessageExtension,
        ForeignMessage.newBuilder().setC(319).build());
      message.addExtension(repeatedImportMessageExtension,
        ImportMessage.newBuilder().setD(320).build());
      message.addExtension(repeatedLazyMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(327).build());
  
      message.addExtension(repeatedNestedEnumExtension, TestAllTypes.NestedEnum.BAZ);
      message.addExtension(repeatedForeignEnumExtension, ForeignEnum.FOREIGN_BAZ);
      message.addExtension(repeatedImportEnumExtension, ImportEnum.IMPORT_BAZ);
  
      message.addExtension(repeatedStringPieceExtension, "324");
      message.addExtension(repeatedCordExtension, "325");
  
      // -----------------------------------------------------------------
  
      message.setExtension(defaultInt32Extension   , 401);
      message.setExtension(defaultInt64Extension   , 402L);
      message.setExtension(defaultUint32Extension  , 403);
      message.setExtension(defaultUint64Extension  , 404L);
      message.setExtension(defaultSint32Extension  , 405);
      message.setExtension(defaultSint64Extension  , 406L);
      message.setExtension(defaultFixed32Extension , 407);
      message.setExtension(defaultFixed64Extension , 408L);
      message.setExtension(defaultSfixed32Extension, 409);
      message.setExtension(defaultSfixed64Extension, 410L);
      message.setExtension(defaultFloatExtension   , 411F);
      message.setExtension(defaultDoubleExtension  , 412D);
      message.setExtension(defaultBoolExtension    , false);
      message.setExtension(defaultStringExtension  , "415");
      message.setExtension(defaultBytesExtension   , toBytes("416"));
  
      message.setExtension(defaultNestedEnumExtension, TestAllTypes.NestedEnum.FOO);
      message.setExtension(defaultForeignEnumExtension, ForeignEnum.FOREIGN_FOO);
      message.setExtension(defaultImportEnumExtension, ImportEnum.IMPORT_FOO);
  
      message.setExtension(defaultStringPieceExtension, "424");
      message.setExtension(defaultCordExtension, "425");
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Modify the repeated extensions of {@code message} to contain the values
     * expected by {@code assertRepeatedExtensionsModified()}.
     */
    public static void modifyRepeatedExtensions(
        TestAllExtensions.Builder message) {
      message.setExtension(repeatedInt32Extension   , 1, 501);
      message.setExtension(repeatedInt64Extension   , 1, 502L);
      message.setExtension(repeatedUint32Extension  , 1, 503);
      message.setExtension(repeatedUint64Extension  , 1, 504L);
      message.setExtension(repeatedSint32Extension  , 1, 505);
      message.setExtension(repeatedSint64Extension  , 1, 506L);
      message.setExtension(repeatedFixed32Extension , 1, 507);
      message.setExtension(repeatedFixed64Extension , 1, 508L);
      message.setExtension(repeatedSfixed32Extension, 1, 509);
      message.setExtension(repeatedSfixed64Extension, 1, 510L);
      message.setExtension(repeatedFloatExtension   , 1, 511F);
      message.setExtension(repeatedDoubleExtension  , 1, 512D);
      message.setExtension(repeatedBoolExtension    , 1, true);
      message.setExtension(repeatedStringExtension  , 1, "515");
      message.setExtension(repeatedBytesExtension   , 1, toBytes("516"));
  
      message.setExtension(repeatedGroupExtension, 1,
        RepeatedGroup_extension.newBuilder().setA(517).build());
      message.setExtension(repeatedNestedMessageExtension, 1,
        TestAllTypes.NestedMessage.newBuilder().setBb(518).build());
      message.setExtension(repeatedForeignMessageExtension, 1,
        ForeignMessage.newBuilder().setC(519).build());
      message.setExtension(repeatedImportMessageExtension, 1,
        ImportMessage.newBuilder().setD(520).build());
      message.setExtension(repeatedLazyMessageExtension, 1,
        TestAllTypes.NestedMessage.newBuilder().setBb(527).build());
  
      message.setExtension(repeatedNestedEnumExtension , 1, TestAllTypes.NestedEnum.FOO);
      message.setExtension(repeatedForeignEnumExtension, 1, ForeignEnum.FOREIGN_FOO);
      message.setExtension(repeatedImportEnumExtension , 1, ImportEnum.IMPORT_FOO);
  
      message.setExtension(repeatedStringPieceExtension, 1, "524");
      message.setExtension(repeatedCordExtension, 1, "525");
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are set to the values assigned by {@code setAllExtensions}.
     */
    public static void assertAllExtensionsSet(
        TestAllExtensionsOrBuilder message) {
      Assert.assertTrue(message.hasExtension(optionalInt32Extension   ));
      Assert.assertTrue(message.hasExtension(optionalInt64Extension   ));
      Assert.assertTrue(message.hasExtension(optionalUint32Extension  ));
      Assert.assertTrue(message.hasExtension(optionalUint64Extension  ));
      Assert.assertTrue(message.hasExtension(optionalSint32Extension  ));
      Assert.assertTrue(message.hasExtension(optionalSint64Extension  ));
      Assert.assertTrue(message.hasExtension(optionalFixed32Extension ));
      Assert.assertTrue(message.hasExtension(optionalFixed64Extension ));
      Assert.assertTrue(message.hasExtension(optionalSfixed32Extension));
      Assert.assertTrue(message.hasExtension(optionalSfixed64Extension));
      Assert.assertTrue(message.hasExtension(optionalFloatExtension   ));
      Assert.assertTrue(message.hasExtension(optionalDoubleExtension  ));
      Assert.assertTrue(message.hasExtension(optionalBoolExtension    ));
      Assert.assertTrue(message.hasExtension(optionalStringExtension  ));
      Assert.assertTrue(message.hasExtension(optionalBytesExtension   ));
  
      Assert.assertTrue(message.hasExtension(optionalGroupExtension         ));
      Assert.assertTrue(message.hasExtension(optionalNestedMessageExtension ));
      Assert.assertTrue(message.hasExtension(optionalForeignMessageExtension));
      Assert.assertTrue(message.hasExtension(optionalImportMessageExtension ));
  
      Assert.assertTrue(message.getExtension(optionalGroupExtension         ).hasA());
      Assert.assertTrue(message.getExtension(optionalNestedMessageExtension ).hasBb());
      Assert.assertTrue(message.getExtension(optionalForeignMessageExtension).hasC());
      Assert.assertTrue(message.getExtension(optionalImportMessageExtension ).hasD());
  
      Assert.assertTrue(message.hasExtension(optionalNestedEnumExtension ));
      Assert.assertTrue(message.hasExtension(optionalForeignEnumExtension));
      Assert.assertTrue(message.hasExtension(optionalImportEnumExtension ));
  
      Assert.assertTrue(message.hasExtension(optionalStringPieceExtension));
      Assert.assertTrue(message.hasExtension(optionalCordExtension));
  
      assertEqualsExactType(101  , message.getExtension(optionalInt32Extension   ));
      assertEqualsExactType(102L , message.getExtension(optionalInt64Extension   ));
      assertEqualsExactType(103  , message.getExtension(optionalUint32Extension  ));
      assertEqualsExactType(104L , message.getExtension(optionalUint64Extension  ));
      assertEqualsExactType(105  , message.getExtension(optionalSint32Extension  ));
      assertEqualsExactType(106L , message.getExtension(optionalSint64Extension  ));
      assertEqualsExactType(107  , message.getExtension(optionalFixed32Extension ));
      assertEqualsExactType(108L , message.getExtension(optionalFixed64Extension ));
      assertEqualsExactType(109  , message.getExtension(optionalSfixed32Extension));
      assertEqualsExactType(110L , message.getExtension(optionalSfixed64Extension));
      assertEqualsExactType(111F , message.getExtension(optionalFloatExtension   ));
      assertEqualsExactType(112D , message.getExtension(optionalDoubleExtension  ));
      assertEqualsExactType(true , message.getExtension(optionalBoolExtension    ));
      assertEqualsExactType("115", message.getExtension(optionalStringExtension  ));
      assertEqualsExactType(toBytes("116"), message.getExtension(optionalBytesExtension));
  
      assertEqualsExactType(117, message.getExtension(optionalGroupExtension              ).getA());
      assertEqualsExactType(118, message.getExtension(optionalNestedMessageExtension      ).getBb());
      assertEqualsExactType(119, message.getExtension(optionalForeignMessageExtension     ).getC());
      assertEqualsExactType(120, message.getExtension(optionalImportMessageExtension      ).getD());
      assertEqualsExactType(126, message.getExtension(optionalPublicImportMessageExtension).getE());
      assertEqualsExactType(127, message.getExtension(optionalLazyMessageExtension        ).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAZ,
        message.getExtension(optionalNestedEnumExtension));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAZ,
        message.getExtension(optionalForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_BAZ,
        message.getExtension(optionalImportEnumExtension));
  
      assertEqualsExactType("124", message.getExtension(optionalStringPieceExtension));
      assertEqualsExactType("125", message.getExtension(optionalCordExtension));
  
      // -----------------------------------------------------------------
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt32Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt64Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed32Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed64Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed32Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed64Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFloatExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedDoubleExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBoolExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBytesExtension   ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedGroupExtension         ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignMessageExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedLazyMessageExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedEnumExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignEnumExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportEnumExtension    ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringPieceExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedCordExtension));
  
      assertEqualsExactType(201  , message.getExtension(repeatedInt32Extension   , 0));
      assertEqualsExactType(202L , message.getExtension(repeatedInt64Extension   , 0));
      assertEqualsExactType(203  , message.getExtension(repeatedUint32Extension  , 0));
      assertEqualsExactType(204L , message.getExtension(repeatedUint64Extension  , 0));
      assertEqualsExactType(205  , message.getExtension(repeatedSint32Extension  , 0));
      assertEqualsExactType(206L , message.getExtension(repeatedSint64Extension  , 0));
      assertEqualsExactType(207  , message.getExtension(repeatedFixed32Extension , 0));
      assertEqualsExactType(208L , message.getExtension(repeatedFixed64Extension , 0));
      assertEqualsExactType(209  , message.getExtension(repeatedSfixed32Extension, 0));
      assertEqualsExactType(210L , message.getExtension(repeatedSfixed64Extension, 0));
      assertEqualsExactType(211F , message.getExtension(repeatedFloatExtension   , 0));
      assertEqualsExactType(212D , message.getExtension(repeatedDoubleExtension  , 0));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtension    , 0));
      assertEqualsExactType("215", message.getExtension(repeatedStringExtension  , 0));
      assertEqualsExactType(toBytes("216"), message.getExtension(repeatedBytesExtension, 0));
  
      assertEqualsExactType(217, message.getExtension(repeatedGroupExtension         , 0).getA());
      assertEqualsExactType(218, message.getExtension(repeatedNestedMessageExtension , 0).getBb());
      assertEqualsExactType(219, message.getExtension(repeatedForeignMessageExtension, 0).getC());
      assertEqualsExactType(220, message.getExtension(repeatedImportMessageExtension , 0).getD());
      assertEqualsExactType(227, message.getExtension(repeatedLazyMessageExtension   , 0).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAR,
        message.getExtension(repeatedNestedEnumExtension, 0));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
        message.getExtension(repeatedForeignEnumExtension, 0));
      assertEqualsExactType(ImportEnum.IMPORT_BAR,
        message.getExtension(repeatedImportEnumExtension, 0));
  
      assertEqualsExactType("224", message.getExtension(repeatedStringPieceExtension, 0));
      assertEqualsExactType("225", message.getExtension(repeatedCordExtension, 0));
  
      assertEqualsExactType(301  , message.getExtension(repeatedInt32Extension   , 1));
      assertEqualsExactType(302L , message.getExtension(repeatedInt64Extension   , 1));
      assertEqualsExactType(303  , message.getExtension(repeatedUint32Extension  , 1));
      assertEqualsExactType(304L , message.getExtension(repeatedUint64Extension  , 1));
      assertEqualsExactType(305  , message.getExtension(repeatedSint32Extension  , 1));
      assertEqualsExactType(306L , message.getExtension(repeatedSint64Extension  , 1));
      assertEqualsExactType(307  , message.getExtension(repeatedFixed32Extension , 1));
      assertEqualsExactType(308L , message.getExtension(repeatedFixed64Extension , 1));
      assertEqualsExactType(309  , message.getExtension(repeatedSfixed32Extension, 1));
      assertEqualsExactType(310L , message.getExtension(repeatedSfixed64Extension, 1));
      assertEqualsExactType(311F , message.getExtension(repeatedFloatExtension   , 1));
      assertEqualsExactType(312D , message.getExtension(repeatedDoubleExtension  , 1));
      assertEqualsExactType(false, message.getExtension(repeatedBoolExtension    , 1));
      assertEqualsExactType("315", message.getExtension(repeatedStringExtension  , 1));
      assertEqualsExactType(toBytes("316"), message.getExtension(repeatedBytesExtension, 1));
  
      assertEqualsExactType(317, message.getExtension(repeatedGroupExtension         , 1).getA());
      assertEqualsExactType(318, message.getExtension(repeatedNestedMessageExtension , 1).getBb());
      assertEqualsExactType(319, message.getExtension(repeatedForeignMessageExtension, 1).getC());
      assertEqualsExactType(320, message.getExtension(repeatedImportMessageExtension , 1).getD());
      assertEqualsExactType(327, message.getExtension(repeatedLazyMessageExtension   , 1).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAZ,
        message.getExtension(repeatedNestedEnumExtension, 1));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAZ,
        message.getExtension(repeatedForeignEnumExtension, 1));
      assertEqualsExactType(ImportEnum.IMPORT_BAZ,
        message.getExtension(repeatedImportEnumExtension, 1));
  
      assertEqualsExactType("324", message.getExtension(repeatedStringPieceExtension, 1));
      assertEqualsExactType("325", message.getExtension(repeatedCordExtension, 1));
  
      // -----------------------------------------------------------------
  
      Assert.assertTrue(message.hasExtension(defaultInt32Extension   ));
      Assert.assertTrue(message.hasExtension(defaultInt64Extension   ));
      Assert.assertTrue(message.hasExtension(defaultUint32Extension  ));
      Assert.assertTrue(message.hasExtension(defaultUint64Extension  ));
      Assert.assertTrue(message.hasExtension(defaultSint32Extension  ));
      Assert.assertTrue(message.hasExtension(defaultSint64Extension  ));
      Assert.assertTrue(message.hasExtension(defaultFixed32Extension ));
      Assert.assertTrue(message.hasExtension(defaultFixed64Extension ));
      Assert.assertTrue(message.hasExtension(defaultSfixed32Extension));
      Assert.assertTrue(message.hasExtension(defaultSfixed64Extension));
      Assert.assertTrue(message.hasExtension(defaultFloatExtension   ));
      Assert.assertTrue(message.hasExtension(defaultDoubleExtension  ));
      Assert.assertTrue(message.hasExtension(defaultBoolExtension    ));
      Assert.assertTrue(message.hasExtension(defaultStringExtension  ));
      Assert.assertTrue(message.hasExtension(defaultBytesExtension   ));
  
      Assert.assertTrue(message.hasExtension(defaultNestedEnumExtension ));
      Assert.assertTrue(message.hasExtension(defaultForeignEnumExtension));
      Assert.assertTrue(message.hasExtension(defaultImportEnumExtension ));
  
      Assert.assertTrue(message.hasExtension(defaultStringPieceExtension));
      Assert.assertTrue(message.hasExtension(defaultCordExtension));
  
      assertEqualsExactType(401  , message.getExtension(defaultInt32Extension   ));
      assertEqualsExactType(402L , message.getExtension(defaultInt64Extension   ));
      assertEqualsExactType(403  , message.getExtension(defaultUint32Extension  ));
      assertEqualsExactType(404L , message.getExtension(defaultUint64Extension  ));
      assertEqualsExactType(405  , message.getExtension(defaultSint32Extension  ));
      assertEqualsExactType(406L , message.getExtension(defaultSint64Extension  ));
      assertEqualsExactType(407  , message.getExtension(defaultFixed32Extension ));
      assertEqualsExactType(408L , message.getExtension(defaultFixed64Extension ));
      assertEqualsExactType(409  , message.getExtension(defaultSfixed32Extension));
      assertEqualsExactType(410L , message.getExtension(defaultSfixed64Extension));
      assertEqualsExactType(411F , message.getExtension(defaultFloatExtension   ));
      assertEqualsExactType(412D , message.getExtension(defaultDoubleExtension  ));
      assertEqualsExactType(false, message.getExtension(defaultBoolExtension    ));
      assertEqualsExactType("415", message.getExtension(defaultStringExtension  ));
      assertEqualsExactType(toBytes("416"), message.getExtension(defaultBytesExtension));
  
      assertEqualsExactType(TestAllTypes.NestedEnum.FOO,
        message.getExtension(defaultNestedEnumExtension ));
      assertEqualsExactType(ForeignEnum.FOREIGN_FOO,
        message.getExtension(defaultForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_FOO,
        message.getExtension(defaultImportEnumExtension));
  
      assertEqualsExactType("424", message.getExtension(defaultStringPieceExtension));
      assertEqualsExactType("425", message.getExtension(defaultCordExtension));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are cleared, and that getting the extensions returns their
     * default values.
     */
    public static void assertExtensionsClear(TestAllExtensionsOrBuilder message) {
      // hasBlah() should initially be false for all optional fields.
      Assert.assertFalse(message.hasExtension(optionalInt32Extension   ));
      Assert.assertFalse(message.hasExtension(optionalInt64Extension   ));
      Assert.assertFalse(message.hasExtension(optionalUint32Extension  ));
      Assert.assertFalse(message.hasExtension(optionalUint64Extension  ));
      Assert.assertFalse(message.hasExtension(optionalSint32Extension  ));
      Assert.assertFalse(message.hasExtension(optionalSint64Extension  ));
      Assert.assertFalse(message.hasExtension(optionalFixed32Extension ));
      Assert.assertFalse(message.hasExtension(optionalFixed64Extension ));
      Assert.assertFalse(message.hasExtension(optionalSfixed32Extension));
      Assert.assertFalse(message.hasExtension(optionalSfixed64Extension));
      Assert.assertFalse(message.hasExtension(optionalFloatExtension   ));
      Assert.assertFalse(message.hasExtension(optionalDoubleExtension  ));
      Assert.assertFalse(message.hasExtension(optionalBoolExtension    ));
      Assert.assertFalse(message.hasExtension(optionalStringExtension  ));
      Assert.assertFalse(message.hasExtension(optionalBytesExtension   ));
  
      Assert.assertFalse(message.hasExtension(optionalGroupExtension         ));
      Assert.assertFalse(message.hasExtension(optionalNestedMessageExtension ));
      Assert.assertFalse(message.hasExtension(optionalForeignMessageExtension));
      Assert.assertFalse(message.hasExtension(optionalImportMessageExtension ));
  
      Assert.assertFalse(message.hasExtension(optionalNestedEnumExtension ));
      Assert.assertFalse(message.hasExtension(optionalForeignEnumExtension));
      Assert.assertFalse(message.hasExtension(optionalImportEnumExtension ));
  
      Assert.assertFalse(message.hasExtension(optionalStringPieceExtension));
      Assert.assertFalse(message.hasExtension(optionalCordExtension));
  
      // Optional fields without defaults are set to zero or something like it.
      assertEqualsExactType(0    , message.getExtension(optionalInt32Extension   ));
      assertEqualsExactType(0L   , message.getExtension(optionalInt64Extension   ));
      assertEqualsExactType(0    , message.getExtension(optionalUint32Extension  ));
      assertEqualsExactType(0L   , message.getExtension(optionalUint64Extension  ));
      assertEqualsExactType(0    , message.getExtension(optionalSint32Extension  ));
      assertEqualsExactType(0L   , message.getExtension(optionalSint64Extension  ));
      assertEqualsExactType(0    , message.getExtension(optionalFixed32Extension ));
      assertEqualsExactType(0L   , message.getExtension(optionalFixed64Extension ));
      assertEqualsExactType(0    , message.getExtension(optionalSfixed32Extension));
      assertEqualsExactType(0L   , message.getExtension(optionalSfixed64Extension));
      assertEqualsExactType(0F   , message.getExtension(optionalFloatExtension   ));
      assertEqualsExactType(0D   , message.getExtension(optionalDoubleExtension  ));
      assertEqualsExactType(false, message.getExtension(optionalBoolExtension    ));
      assertEqualsExactType(""   , message.getExtension(optionalStringExtension  ));
      assertEqualsExactType(ByteString.EMPTY, message.getExtension(optionalBytesExtension));
  
      // Embedded messages should also be clear.
      Assert.assertFalse(message.getExtension(optionalGroupExtension         ).hasA());
      Assert.assertFalse(message.getExtension(optionalNestedMessageExtension ).hasBb());
      Assert.assertFalse(message.getExtension(optionalForeignMessageExtension).hasC());
      Assert.assertFalse(message.getExtension(optionalImportMessageExtension ).hasD());
  
      assertEqualsExactType(0, message.getExtension(optionalGroupExtension         ).getA());
      assertEqualsExactType(0, message.getExtension(optionalNestedMessageExtension ).getBb());
      assertEqualsExactType(0, message.getExtension(optionalForeignMessageExtension).getC());
      assertEqualsExactType(0, message.getExtension(optionalImportMessageExtension ).getD());
  
      // Enums without defaults are set to the first value in the enum.
      assertEqualsExactType(TestAllTypes.NestedEnum.FOO,
        message.getExtension(optionalNestedEnumExtension ));
      assertEqualsExactType(ForeignEnum.FOREIGN_FOO,
        message.getExtension(optionalForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_FOO,
        message.getExtension(optionalImportEnumExtension));
  
      assertEqualsExactType("", message.getExtension(optionalStringPieceExtension));
      assertEqualsExactType("", message.getExtension(optionalCordExtension));
  
      // Repeated fields are empty.
      Assert.assertEquals(0, message.getExtensionCount(repeatedInt32Extension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedInt64Extension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedUint32Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedUint64Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSint32Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSint64Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFixed32Extension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFixed64Extension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSfixed32Extension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSfixed64Extension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFloatExtension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedDoubleExtension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedBoolExtension    ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedStringExtension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedBytesExtension   ));
  
      Assert.assertEquals(0, message.getExtensionCount(repeatedGroupExtension         ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedNestedMessageExtension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedForeignMessageExtension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedImportMessageExtension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedLazyMessageExtension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedNestedEnumExtension    ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedForeignEnumExtension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedImportEnumExtension    ));
  
      Assert.assertEquals(0, message.getExtensionCount(repeatedStringPieceExtension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedCordExtension));
  
      // Repeated fields are empty via getExtension().size().
      Assert.assertEquals(0, message.getExtension(repeatedInt32Extension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedInt64Extension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedUint32Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedUint64Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedSint32Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedSint64Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedFixed32Extension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedFixed64Extension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedSfixed32Extension).size());
      Assert.assertEquals(0, message.getExtension(repeatedSfixed64Extension).size());
      Assert.assertEquals(0, message.getExtension(repeatedFloatExtension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedDoubleExtension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedBoolExtension    ).size());
      Assert.assertEquals(0, message.getExtension(repeatedStringExtension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedBytesExtension   ).size());
  
      Assert.assertEquals(0, message.getExtension(repeatedGroupExtension         ).size());
      Assert.assertEquals(0, message.getExtension(repeatedNestedMessageExtension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedForeignMessageExtension).size());
      Assert.assertEquals(0, message.getExtension(repeatedImportMessageExtension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedLazyMessageExtension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedNestedEnumExtension    ).size());
      Assert.assertEquals(0, message.getExtension(repeatedForeignEnumExtension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedImportEnumExtension    ).size());
  
      Assert.assertEquals(0, message.getExtension(repeatedStringPieceExtension).size());
      Assert.assertEquals(0, message.getExtension(repeatedCordExtension).size());
  
      // hasBlah() should also be false for all default fields.
      Assert.assertFalse(message.hasExtension(defaultInt32Extension   ));
      Assert.assertFalse(message.hasExtension(defaultInt64Extension   ));
      Assert.assertFalse(message.hasExtension(defaultUint32Extension  ));
      Assert.assertFalse(message.hasExtension(defaultUint64Extension  ));
      Assert.assertFalse(message.hasExtension(defaultSint32Extension  ));
      Assert.assertFalse(message.hasExtension(defaultSint64Extension  ));
      Assert.assertFalse(message.hasExtension(defaultFixed32Extension ));
      Assert.assertFalse(message.hasExtension(defaultFixed64Extension ));
      Assert.assertFalse(message.hasExtension(defaultSfixed32Extension));
      Assert.assertFalse(message.hasExtension(defaultSfixed64Extension));
      Assert.assertFalse(message.hasExtension(defaultFloatExtension   ));
      Assert.assertFalse(message.hasExtension(defaultDoubleExtension  ));
      Assert.assertFalse(message.hasExtension(defaultBoolExtension    ));
      Assert.assertFalse(message.hasExtension(defaultStringExtension  ));
      Assert.assertFalse(message.hasExtension(defaultBytesExtension   ));
  
      Assert.assertFalse(message.hasExtension(defaultNestedEnumExtension ));
      Assert.assertFalse(message.hasExtension(defaultForeignEnumExtension));
      Assert.assertFalse(message.hasExtension(defaultImportEnumExtension ));
  
      Assert.assertFalse(message.hasExtension(defaultStringPieceExtension));
      Assert.assertFalse(message.hasExtension(defaultCordExtension));
  
      // Fields with defaults have their default values (duh).
      assertEqualsExactType( 41    , message.getExtension(defaultInt32Extension   ));
      assertEqualsExactType( 42L   , message.getExtension(defaultInt64Extension   ));
      assertEqualsExactType( 43    , message.getExtension(defaultUint32Extension  ));
      assertEqualsExactType( 44L   , message.getExtension(defaultUint64Extension  ));
      assertEqualsExactType(-45    , message.getExtension(defaultSint32Extension  ));
      assertEqualsExactType( 46L   , message.getExtension(defaultSint64Extension  ));
      assertEqualsExactType( 47    , message.getExtension(defaultFixed32Extension ));
      assertEqualsExactType( 48L   , message.getExtension(defaultFixed64Extension ));
      assertEqualsExactType( 49    , message.getExtension(defaultSfixed32Extension));
      assertEqualsExactType(-50L   , message.getExtension(defaultSfixed64Extension));
      assertEqualsExactType( 51.5F , message.getExtension(defaultFloatExtension   ));
      assertEqualsExactType( 52e3D , message.getExtension(defaultDoubleExtension  ));
      assertEqualsExactType(true   , message.getExtension(defaultBoolExtension    ));
      assertEqualsExactType("hello", message.getExtension(defaultStringExtension  ));
      assertEqualsExactType(toBytes("world"), message.getExtension(defaultBytesExtension));
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAR,
        message.getExtension(defaultNestedEnumExtension ));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
        message.getExtension(defaultForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_BAR,
        message.getExtension(defaultImportEnumExtension));
  
      assertEqualsExactType("abc", message.getExtension(defaultStringPieceExtension));
      assertEqualsExactType("123", message.getExtension(defaultCordExtension));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are set to the values assigned by {@code setAllExtensions}
     * followed by {@code modifyRepeatedExtensions}.
     */
    public static void assertRepeatedExtensionsModified(
        TestAllExtensionsOrBuilder message) {
      // ModifyRepeatedFields only sets the second repeated element of each
      // field.  In addition to verifying this, we also verify that the first
      // element and size were *not* modified.
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt32Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt64Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed32Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed64Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed32Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed64Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFloatExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedDoubleExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBoolExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBytesExtension   ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedGroupExtension         ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignMessageExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedLazyMessageExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedEnumExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignEnumExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportEnumExtension    ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringPieceExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedCordExtension));
  
      assertEqualsExactType(201  , message.getExtension(repeatedInt32Extension   , 0));
      assertEqualsExactType(202L , message.getExtension(repeatedInt64Extension   , 0));
      assertEqualsExactType(203  , message.getExtension(repeatedUint32Extension  , 0));
      assertEqualsExactType(204L , message.getExtension(repeatedUint64Extension  , 0));
      assertEqualsExactType(205  , message.getExtension(repeatedSint32Extension  , 0));
      assertEqualsExactType(206L , message.getExtension(repeatedSint64Extension  , 0));
      assertEqualsExactType(207  , message.getExtension(repeatedFixed32Extension , 0));
      assertEqualsExactType(208L , message.getExtension(repeatedFixed64Extension , 0));
      assertEqualsExactType(209  , message.getExtension(repeatedSfixed32Extension, 0));
      assertEqualsExactType(210L , message.getExtension(repeatedSfixed64Extension, 0));
      assertEqualsExactType(211F , message.getExtension(repeatedFloatExtension   , 0));
      assertEqualsExactType(212D , message.getExtension(repeatedDoubleExtension  , 0));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtension    , 0));
      assertEqualsExactType("215", message.getExtension(repeatedStringExtension  , 0));
      assertEqualsExactType(toBytes("216"), message.getExtension(repeatedBytesExtension, 0));
  
      assertEqualsExactType(217, message.getExtension(repeatedGroupExtension         , 0).getA());
      assertEqualsExactType(218, message.getExtension(repeatedNestedMessageExtension , 0).getBb());
      assertEqualsExactType(219, message.getExtension(repeatedForeignMessageExtension, 0).getC());
      assertEqualsExactType(220, message.getExtension(repeatedImportMessageExtension , 0).getD());
      assertEqualsExactType(227, message.getExtension(repeatedLazyMessageExtension   , 0).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAR,
        message.getExtension(repeatedNestedEnumExtension, 0));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
        message.getExtension(repeatedForeignEnumExtension, 0));
      assertEqualsExactType(ImportEnum.IMPORT_BAR,
        message.getExtension(repeatedImportEnumExtension, 0));
  
      assertEqualsExactType("224", message.getExtension(repeatedStringPieceExtension, 0));
      assertEqualsExactType("225", message.getExtension(repeatedCordExtension, 0));
  
      // Actually verify the second (modified) elements now.
      assertEqualsExactType(501  , message.getExtension(repeatedInt32Extension   , 1));
      assertEqualsExactType(502L , message.getExtension(repeatedInt64Extension   , 1));
      assertEqualsExactType(503  , message.getExtension(repeatedUint32Extension  , 1));
      assertEqualsExactType(504L , message.getExtension(repeatedUint64Extension  , 1));
      assertEqualsExactType(505  , message.getExtension(repeatedSint32Extension  , 1));
      assertEqualsExactType(506L , message.getExtension(repeatedSint64Extension  , 1));
      assertEqualsExactType(507  , message.getExtension(repeatedFixed32Extension , 1));
      assertEqualsExactType(508L , message.getExtension(repeatedFixed64Extension , 1));
      assertEqualsExactType(509  , message.getExtension(repeatedSfixed32Extension, 1));
      assertEqualsExactType(510L , message.getExtension(repeatedSfixed64Extension, 1));
      assertEqualsExactType(511F , message.getExtension(repeatedFloatExtension   , 1));
      assertEqualsExactType(512D , message.getExtension(repeatedDoubleExtension  , 1));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtension    , 1));
      assertEqualsExactType("515", message.getExtension(repeatedStringExtension  , 1));
      assertEqualsExactType(toBytes("516"), message.getExtension(repeatedBytesExtension, 1));
  
      assertEqualsExactType(517, message.getExtension(repeatedGroupExtension         , 1).getA());
      assertEqualsExactType(518, message.getExtension(repeatedNestedMessageExtension , 1).getBb());
      assertEqualsExactType(519, message.getExtension(repeatedForeignMessageExtension, 1).getC());
      assertEqualsExactType(520, message.getExtension(repeatedImportMessageExtension , 1).getD());
      assertEqualsExactType(527, message.getExtension(repeatedLazyMessageExtension   , 1).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.FOO,
        message.getExtension(repeatedNestedEnumExtension, 1));
      assertEqualsExactType(ForeignEnum.FOREIGN_FOO,
        message.getExtension(repeatedForeignEnumExtension, 1));
      assertEqualsExactType(ImportEnum.IMPORT_FOO,
        message.getExtension(repeatedImportEnumExtension, 1));
  
      assertEqualsExactType("524", message.getExtension(repeatedStringPieceExtension, 1));
      assertEqualsExactType("525", message.getExtension(repeatedCordExtension, 1));
    }
  
    public static void setPackedExtensions(TestPackedExtensions.Builder message) {
      message.addExtension(packedInt32Extension   , 601);
      message.addExtension(packedInt64Extension   , 602L);
      message.addExtension(packedUint32Extension  , 603);
      message.addExtension(packedUint64Extension  , 604L);
      message.addExtension(packedSint32Extension  , 605);
      message.addExtension(packedSint64Extension  , 606L);
      message.addExtension(packedFixed32Extension , 607);
      message.addExtension(packedFixed64Extension , 608L);
      message.addExtension(packedSfixed32Extension, 609);
      message.addExtension(packedSfixed64Extension, 610L);
      message.addExtension(packedFloatExtension   , 611F);
      message.addExtension(packedDoubleExtension  , 612D);
      message.addExtension(packedBoolExtension    , true);
      message.addExtension(packedEnumExtension, ForeignEnum.FOREIGN_BAR);
      // Add a second one of each field.
      message.addExtension(packedInt32Extension   , 701);
      message.addExtension(packedInt64Extension   , 702L);
      message.addExtension(packedUint32Extension  , 703);
      message.addExtension(packedUint64Extension  , 704L);
      message.addExtension(packedSint32Extension  , 705);
      message.addExtension(packedSint64Extension  , 706L);
      message.addExtension(packedFixed32Extension , 707);
      message.addExtension(packedFixed64Extension , 708L);
      message.addExtension(packedSfixed32Extension, 709);
      message.addExtension(packedSfixed64Extension, 710L);
      message.addExtension(packedFloatExtension   , 711F);
      message.addExtension(packedDoubleExtension  , 712D);
      message.addExtension(packedBoolExtension    , false);
      message.addExtension(packedEnumExtension, ForeignEnum.FOREIGN_BAZ);
    }
  
    public static void assertPackedExtensionsSet(TestPackedExtensions message) {
      Assert.assertEquals(2, message.getExtensionCount(packedInt32Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(packedInt64Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(packedUint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedUint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedSint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedSint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedFixed32Extension ));
      Assert.assertEquals(2, message.getExtensionCount(packedFixed64Extension ));
      Assert.assertEquals(2, message.getExtensionCount(packedSfixed32Extension));
      Assert.assertEquals(2, message.getExtensionCount(packedSfixed64Extension));
      Assert.assertEquals(2, message.getExtensionCount(packedFloatExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(packedDoubleExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedBoolExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(packedEnumExtension));
      assertEqualsExactType(601  , message.getExtension(packedInt32Extension   , 0));
      assertEqualsExactType(602L , message.getExtension(packedInt64Extension   , 0));
      assertEqualsExactType(603  , message.getExtension(packedUint32Extension  , 0));
      assertEqualsExactType(604L , message.getExtension(packedUint64Extension  , 0));
      assertEqualsExactType(605  , message.getExtension(packedSint32Extension  , 0));
      assertEqualsExactType(606L , message.getExtension(packedSint64Extension  , 0));
      assertEqualsExactType(607  , message.getExtension(packedFixed32Extension , 0));
      assertEqualsExactType(608L , message.getExtension(packedFixed64Extension , 0));
      assertEqualsExactType(609  , message.getExtension(packedSfixed32Extension, 0));
      assertEqualsExactType(610L , message.getExtension(packedSfixed64Extension, 0));
      assertEqualsExactType(611F , message.getExtension(packedFloatExtension   , 0));
      assertEqualsExactType(612D , message.getExtension(packedDoubleExtension  , 0));
      assertEqualsExactType(true , message.getExtension(packedBoolExtension    , 0));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
                            message.getExtension(packedEnumExtension, 0));
      assertEqualsExactType(701  , message.getExtension(packedInt32Extension   , 1));
      assertEqualsExactType(702L , message.getExtension(packedInt64Extension   , 1));
      assertEqualsExactType(703  , message.getExtension(packedUint32Extension  , 1));
      assertEqualsExactType(704L , message.getExtension(packedUint64Extension  , 1));
      assertEqualsExactType(705  , message.getExtension(packedSint32Extension  , 1));
      assertEqualsExactType(706L , message.getExtension(packedSint64Extension  , 1));
      assertEqualsExactType(707  , message.getExtension(packedFixed32Extension , 1));
      assertEqualsExactType(708L , message.getExtension(packedFixed64Extension , 1));
      assertEqualsExactType(709  , message.getExtension(packedSfixed32Extension, 1));
      assertEqualsExactType(710L , message.getExtension(packedSfixed64Extension, 1));
      assertEqualsExactType(711F , message.getExtension(packedFloatExtension   , 1));
      assertEqualsExactType(712D , message.getExtension(packedDoubleExtension  , 1));
      assertEqualsExactType(false, message.getExtension(packedBoolExtension    , 1));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAZ,
                            message.getExtension(packedEnumExtension, 1));
    }
  
    // =================================================================
  
    /**
     * Performs the same things that the methods of {@code TestUtil} do, but
     * via the reflection interface.  This is its own class because it needs
     * to know what descriptor to use.
     */
    public static class ReflectionTester {
      private final Descriptors.Descriptor baseDescriptor;
      private final ExtensionRegistry extensionRegistry;
  
      private final Descriptors.FileDescriptor file;
      private final Descriptors.FileDescriptor importFile;
      private final Descriptors.FileDescriptor publicImportFile;
  
      private final Descriptors.Descriptor optionalGroup;
      private final Descriptors.Descriptor repeatedGroup;
      private final Descriptors.Descriptor nestedMessage;
      private final Descriptors.Descriptor foreignMessage;
      private final Descriptors.Descriptor importMessage;
      private final Descriptors.Descriptor publicImportMessage;
  
      private final Descriptors.FieldDescriptor groupA;
      private final Descriptors.FieldDescriptor repeatedGroupA;
      private final Descriptors.FieldDescriptor nestedB;
      private final Descriptors.FieldDescriptor foreignC;
      private final Descriptors.FieldDescriptor importD;
      private final Descriptors.FieldDescriptor importE;
  
      private final Descriptors.EnumDescriptor nestedEnum;
      private final Descriptors.EnumDescriptor foreignEnum;
      private final Descriptors.EnumDescriptor importEnum;
  
      private final Descriptors.EnumValueDescriptor nestedFoo;
      private final Descriptors.EnumValueDescriptor nestedBar;
      private final Descriptors.EnumValueDescriptor nestedBaz;
      private final Descriptors.EnumValueDescriptor foreignFoo;
      private final Descriptors.EnumValueDescriptor foreignBar;
      private final Descriptors.EnumValueDescriptor foreignBaz;
      private final Descriptors.EnumValueDescriptor importFoo;
      private final Descriptors.EnumValueDescriptor importBar;
      private final Descriptors.EnumValueDescriptor importBaz;
  
      /**
       * Construct a {@code ReflectionTester} that will expect messages using
       * the given descriptor.
       *
       * Normally {@code baseDescriptor} should be a descriptor for the type
       * {@code TestAllTypes}, defined in
       * {@code google/protobuf/unittest.proto}.  However, if
       * {@code extensionRegistry} is non-null, then {@code baseDescriptor} should
       * be for {@code TestAllExtensions} instead, and instead of reading and
       * writing normal fields, the tester will read and write extensions.
       * All of {@code TestAllExtensions}' extensions must be registered in the
       * registry.
       */
      public ReflectionTester(Descriptors.Descriptor baseDescriptor,
                              ExtensionRegistry extensionRegistry) {
        this.baseDescriptor = baseDescriptor;
        this.extensionRegistry = extensionRegistry;
  
        this.file = baseDescriptor.getFile();
        Assert.assertEquals(1, file.getDependencies().size());
        this.importFile = file.getDependencies().get(0);
        this.publicImportFile = importFile.getDependencies().get(0);
  
        Descriptors.Descriptor testAllTypes;
        if (baseDescriptor.getName() == "TestAllTypes") {
          testAllTypes = baseDescriptor;
        } else {
          testAllTypes = file.findMessageTypeByName("TestAllTypes");
          Assert.assertNotNull(testAllTypes);
        }
  
        if (extensionRegistry == null) {
          // Use testAllTypes, rather than baseDescriptor, to allow
          // initialization using TestPackedTypes descriptors. These objects
          // won't be used by the methods for packed fields.
          this.optionalGroup =
            testAllTypes.findNestedTypeByName("OptionalGroup");
          this.repeatedGroup =
            testAllTypes.findNestedTypeByName("RepeatedGroup");
        } else {
          this.optionalGroup =
            file.findMessageTypeByName("OptionalGroup_extension");
          this.repeatedGroup =
            file.findMessageTypeByName("RepeatedGroup_extension");
        }
        this.nestedMessage = testAllTypes.findNestedTypeByName("NestedMessage");
        this.foreignMessage = file.findMessageTypeByName("ForeignMessage");
        this.importMessage = importFile.findMessageTypeByName("ImportMessage");
        this.publicImportMessage = publicImportFile.findMessageTypeByName(
            "PublicImportMessage");
  
        this.nestedEnum = testAllTypes.findEnumTypeByName("NestedEnum");
        this.foreignEnum = file.findEnumTypeByName("ForeignEnum");
        this.importEnum = importFile.findEnumTypeByName("ImportEnum");
  
        Assert.assertNotNull(optionalGroup );
        Assert.assertNotNull(repeatedGroup );
        Assert.assertNotNull(nestedMessage );
        Assert.assertNotNull(foreignMessage);
        Assert.assertNotNull(importMessage );
        Assert.assertNotNull(nestedEnum    );
        Assert.assertNotNull(foreignEnum   );
        Assert.assertNotNull(importEnum    );
  
        this.nestedB  = nestedMessage .findFieldByName("bb");
        this.foreignC = foreignMessage.findFieldByName("c");
        this.importD  = importMessage .findFieldByName("d");
        this.importE  = publicImportMessage.findFieldByName("e");
        this.nestedFoo = nestedEnum.findValueByName("FOO");
        this.nestedBar = nestedEnum.findValueByName("BAR");
        this.nestedBaz = nestedEnum.findValueByName("BAZ");
        this.foreignFoo = foreignEnum.findValueByName("FOREIGN_FOO");
        this.foreignBar = foreignEnum.findValueByName("FOREIGN_BAR");
        this.foreignBaz = foreignEnum.findValueByName("FOREIGN_BAZ");
        this.importFoo = importEnum.findValueByName("IMPORT_FOO");
        this.importBar = importEnum.findValueByName("IMPORT_BAR");
        this.importBaz = importEnum.findValueByName("IMPORT_BAZ");
  
        this.groupA = optionalGroup.findFieldByName("a");
        this.repeatedGroupA = repeatedGroup.findFieldByName("a");
  
        Assert.assertNotNull(groupA        );
        Assert.assertNotNull(repeatedGroupA);
        Assert.assertNotNull(nestedB       );
        Assert.assertNotNull(foreignC      );
        Assert.assertNotNull(importD       );
        Assert.assertNotNull(importE       );
        Assert.assertNotNull(nestedFoo     );
        Assert.assertNotNull(nestedBar     );
        Assert.assertNotNull(nestedBaz     );
        Assert.assertNotNull(foreignFoo    );
        Assert.assertNotNull(foreignBar    );
        Assert.assertNotNull(foreignBaz    );
        Assert.assertNotNull(importFoo     );
        Assert.assertNotNull(importBar     );
        Assert.assertNotNull(importBaz     );
      }
  
      /**
       * Shorthand to get a FieldDescriptor for a field of unittest::TestAllTypes.
       */
      private Descriptors.FieldDescriptor f(String name) {
        Descriptors.FieldDescriptor result;
        if (extensionRegistry == null) {
          result = baseDescriptor.findFieldByName(name);
        } else {
          result = file.findExtensionByName(name + "_extension");
        }
        Assert.assertNotNull(result);
        return result;
      }
  
      /**
       * Calls {@code parent.newBuilderForField()} or uses the
       * {@code ExtensionRegistry} to find an appropriate builder, depending
       * on what type is being tested.
       */
      private Message.Builder newBuilderForField(
          Message.Builder parent, Descriptors.FieldDescriptor field) {
        if (extensionRegistry == null) {
          return parent.newBuilderForField(field);
        } else {
          ExtensionRegistry.ExtensionInfo extension =
            extensionRegistry.findExtensionByNumber(field.getContainingType(),
                                                    field.getNumber());
          Assert.assertNotNull(extension);
          Assert.assertNotNull(extension.defaultInstance);
          return extension.defaultInstance.newBuilderForType();
        }
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Set every field of {@code message} to the values expected by
       * {@code assertAllFieldsSet()}, using the {@link Message.Builder}
       * reflection interface.
       */
      void setAllFieldsViaReflection(Message.Builder message) {
        message.setField(f("optional_int32"   ), 101 );
        message.setField(f("optional_int64"   ), 102L);
        message.setField(f("optional_uint32"  ), 103 );
        message.setField(f("optional_uint64"  ), 104L);
        message.setField(f("optional_sint32"  ), 105 );
        message.setField(f("optional_sint64"  ), 106L);
        message.setField(f("optional_fixed32" ), 107 );
        message.setField(f("optional_fixed64" ), 108L);
        message.setField(f("optional_sfixed32"), 109 );
        message.setField(f("optional_sfixed64"), 110L);
        message.setField(f("optional_float"   ), 111F);
        message.setField(f("optional_double"  ), 112D);
        message.setField(f("optional_bool"    ), true);
        message.setField(f("optional_string"  ), "115");
        message.setField(f("optional_bytes"   ), toBytes("116"));
  
        message.setField(f("optionalgroup"),
          newBuilderForField(message, f("optionalgroup"))
                 .setField(groupA, 117).build());
        message.setField(f("optional_nested_message"),
          newBuilderForField(message, f("optional_nested_message"))
                 .setField(nestedB, 118).build());
        message.setField(f("optional_foreign_message"),
          newBuilderForField(message, f("optional_foreign_message"))
                 .setField(foreignC, 119).build());
        message.setField(f("optional_import_message"),
          newBuilderForField(message, f("optional_import_message"))
                 .setField(importD, 120).build());
        message.setField(f("optional_public_import_message"),
          newBuilderForField(message, f("optional_public_import_message"))
                 .setField(importE, 126).build());
        message.setField(f("optional_lazy_message"),
          newBuilderForField(message, f("optional_lazy_message"))
                 .setField(nestedB, 127).build());
  
        message.setField(f("optional_nested_enum" ),  nestedBaz);
        message.setField(f("optional_foreign_enum"), foreignBaz);
        message.setField(f("optional_import_enum" ),  importBaz);
  
        message.setField(f("optional_string_piece" ), "124");
        message.setField(f("optional_cord" ), "125");
  
        // -----------------------------------------------------------------
  
        message.addRepeatedField(f("repeated_int32"   ), 201 );
        message.addRepeatedField(f("repeated_int64"   ), 202L);
        message.addRepeatedField(f("repeated_uint32"  ), 203 );
        message.addRepeatedField(f("repeated_uint64"  ), 204L);
        message.addRepeatedField(f("repeated_sint32"  ), 205 );
        message.addRepeatedField(f("repeated_sint64"  ), 206L);
        message.addRepeatedField(f("repeated_fixed32" ), 207 );
        message.addRepeatedField(f("repeated_fixed64" ), 208L);
        message.addRepeatedField(f("repeated_sfixed32"), 209 );
        message.addRepeatedField(f("repeated_sfixed64"), 210L);
        message.addRepeatedField(f("repeated_float"   ), 211F);
        message.addRepeatedField(f("repeated_double"  ), 212D);
        message.addRepeatedField(f("repeated_bool"    ), true);
        message.addRepeatedField(f("repeated_string"  ), "215");
        message.addRepeatedField(f("repeated_bytes"   ), toBytes("216"));
  
        message.addRepeatedField(f("repeatedgroup"),
          newBuilderForField(message, f("repeatedgroup"))
                 .setField(repeatedGroupA, 217).build());
        message.addRepeatedField(f("repeated_nested_message"),
          newBuilderForField(message, f("repeated_nested_message"))
                 .setField(nestedB, 218).build());
        message.addRepeatedField(f("repeated_foreign_message"),
          newBuilderForField(message, f("repeated_foreign_message"))
                 .setField(foreignC, 219).build());
        message.addRepeatedField(f("repeated_import_message"),
          newBuilderForField(message, f("repeated_import_message"))
                 .setField(importD, 220).build());
        message.addRepeatedField(f("repeated_lazy_message"),
          newBuilderForField(message, f("repeated_lazy_message"))
                 .setField(nestedB, 227).build());
  
        message.addRepeatedField(f("repeated_nested_enum" ),  nestedBar);
        message.addRepeatedField(f("repeated_foreign_enum"), foreignBar);
        message.addRepeatedField(f("repeated_import_enum" ),  importBar);
  
        message.addRepeatedField(f("repeated_string_piece" ), "224");
        message.addRepeatedField(f("repeated_cord" ), "225");
  
        // Add a second one of each field.
        message.addRepeatedField(f("repeated_int32"   ), 301 );
        message.addRepeatedField(f("repeated_int64"   ), 302L);
        message.addRepeatedField(f("repeated_uint32"  ), 303 );
        message.addRepeatedField(f("repeated_uint64"  ), 304L);
        message.addRepeatedField(f("repeated_sint32"  ), 305 );
        message.addRepeatedField(f("repeated_sint64"  ), 306L);
        message.addRepeatedField(f("repeated_fixed32" ), 307 );
        message.addRepeatedField(f("repeated_fixed64" ), 308L);
        message.addRepeatedField(f("repeated_sfixed32"), 309 );
        message.addRepeatedField(f("repeated_sfixed64"), 310L);
        message.addRepeatedField(f("repeated_float"   ), 311F);
        message.addRepeatedField(f("repeated_double"  ), 312D);
        message.addRepeatedField(f("repeated_bool"    ), false);
        message.addRepeatedField(f("repeated_string"  ), "315");
        message.addRepeatedField(f("repeated_bytes"   ), toBytes("316"));
  
        message.addRepeatedField(f("repeatedgroup"),
          newBuilderForField(message, f("repeatedgroup"))
                 .setField(repeatedGroupA, 317).build());
        message.addRepeatedField(f("repeated_nested_message"),
          newBuilderForField(message, f("repeated_nested_message"))
                 .setField(nestedB, 318).build());
        message.addRepeatedField(f("repeated_foreign_message"),
          newBuilderForField(message, f("repeated_foreign_message"))
                 .setField(foreignC, 319).build());
        message.addRepeatedField(f("repeated_import_message"),
          newBuilderForField(message, f("repeated_import_message"))
                 .setField(importD, 320).build());
        message.addRepeatedField(f("repeated_lazy_message"),
          newBuilderForField(message, f("repeated_lazy_message"))
                 .setField(nestedB, 327).build());
  
        message.addRepeatedField(f("repeated_nested_enum" ),  nestedBaz);
        message.addRepeatedField(f("repeated_foreign_enum"), foreignBaz);
        message.addRepeatedField(f("repeated_import_enum" ),  importBaz);
  
        message.addRepeatedField(f("repeated_string_piece" ), "324");
        message.addRepeatedField(f("repeated_cord" ), "325");
  
        // -----------------------------------------------------------------
  
        message.setField(f("default_int32"   ), 401 );
        message.setField(f("default_int64"   ), 402L);
        message.setField(f("default_uint32"  ), 403 );
        message.setField(f("default_uint64"  ), 404L);
        message.setField(f("default_sint32"  ), 405 );
        message.setField(f("default_sint64"  ), 406L);
        message.setField(f("default_fixed32" ), 407 );
        message.setField(f("default_fixed64" ), 408L);
        message.setField(f("default_sfixed32"), 409 );
        message.setField(f("default_sfixed64"), 410L);
        message.setField(f("default_float"   ), 411F);
        message.setField(f("default_double"  ), 412D);
        message.setField(f("default_bool"    ), false);
        message.setField(f("default_string"  ), "415");
        message.setField(f("default_bytes"   ), toBytes("416"));
  
        message.setField(f("default_nested_enum" ),  nestedFoo);
        message.setField(f("default_foreign_enum"), foreignFoo);
        message.setField(f("default_import_enum" ),  importFoo);
  
        message.setField(f("default_string_piece" ), "424");
        message.setField(f("default_cord" ), "425");
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Modify the repeated fields of {@code message} to contain the values
       * expected by {@code assertRepeatedFieldsModified()}, using the
       * {@link Message.Builder} reflection interface.
       */
      void modifyRepeatedFieldsViaReflection(Message.Builder message) {
        message.setRepeatedField(f("repeated_int32"   ), 1, 501 );
        message.setRepeatedField(f("repeated_int64"   ), 1, 502L);
        message.setRepeatedField(f("repeated_uint32"  ), 1, 503 );
        message.setRepeatedField(f("repeated_uint64"  ), 1, 504L);
        message.setRepeatedField(f("repeated_sint32"  ), 1, 505 );
        message.setRepeatedField(f("repeated_sint64"  ), 1, 506L);
        message.setRepeatedField(f("repeated_fixed32" ), 1, 507 );
        message.setRepeatedField(f("repeated_fixed64" ), 1, 508L);
        message.setRepeatedField(f("repeated_sfixed32"), 1, 509 );
        message.setRepeatedField(f("repeated_sfixed64"), 1, 510L);
        message.setRepeatedField(f("repeated_float"   ), 1, 511F);
        message.setRepeatedField(f("repeated_double"  ), 1, 512D);
        message.setRepeatedField(f("repeated_bool"    ), 1, true);
        message.setRepeatedField(f("repeated_string"  ), 1, "515");
        message.setRepeatedField(f("repeated_bytes"   ), 1, toBytes("516"));
  
        message.setRepeatedField(f("repeatedgroup"), 1,
          newBuilderForField(message, f("repeatedgroup"))
                 .setField(repeatedGroupA, 517).build());
        message.setRepeatedField(f("repeated_nested_message"), 1,
          newBuilderForField(message, f("repeated_nested_message"))
                 .setField(nestedB, 518).build());
        message.setRepeatedField(f("repeated_foreign_message"), 1,
          newBuilderForField(message, f("repeated_foreign_message"))
                 .setField(foreignC, 519).build());
        message.setRepeatedField(f("repeated_import_message"), 1,
          newBuilderForField(message, f("repeated_import_message"))
                 .setField(importD, 520).build());
        message.setRepeatedField(f("repeated_lazy_message"), 1,
          newBuilderForField(message, f("repeated_lazy_message"))
                 .setField(nestedB, 527).build());
  
        message.setRepeatedField(f("repeated_nested_enum" ), 1,  nestedFoo);
        message.setRepeatedField(f("repeated_foreign_enum"), 1, foreignFoo);
        message.setRepeatedField(f("repeated_import_enum" ), 1,  importFoo);
  
        message.setRepeatedField(f("repeated_string_piece"), 1, "524");
        message.setRepeatedField(f("repeated_cord"), 1, "525");
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Assert (using {@code junit.framework.Assert}} that all fields of
       * {@code message} are set to the values assigned by {@code setAllFields},
       * using the {@link Message} reflection interface.
       */
      public void assertAllFieldsSetViaReflection(MessageOrBuilder message) {
        Assert.assertTrue(message.hasField(f("optional_int32"   )));
        Assert.assertTrue(message.hasField(f("optional_int64"   )));
        Assert.assertTrue(message.hasField(f("optional_uint32"  )));
        Assert.assertTrue(message.hasField(f("optional_uint64"  )));
        Assert.assertTrue(message.hasField(f("optional_sint32"  )));
        Assert.assertTrue(message.hasField(f("optional_sint64"  )));
        Assert.assertTrue(message.hasField(f("optional_fixed32" )));
        Assert.assertTrue(message.hasField(f("optional_fixed64" )));
        Assert.assertTrue(message.hasField(f("optional_sfixed32")));
        Assert.assertTrue(message.hasField(f("optional_sfixed64")));
        Assert.assertTrue(message.hasField(f("optional_float"   )));
        Assert.assertTrue(message.hasField(f("optional_double"  )));
        Assert.assertTrue(message.hasField(f("optional_bool"    )));
        Assert.assertTrue(message.hasField(f("optional_string"  )));
        Assert.assertTrue(message.hasField(f("optional_bytes"   )));
  
        Assert.assertTrue(message.hasField(f("optionalgroup"           )));
        Assert.assertTrue(message.hasField(f("optional_nested_message" )));
        Assert.assertTrue(message.hasField(f("optional_foreign_message")));
        Assert.assertTrue(message.hasField(f("optional_import_message" )));
  
        Assert.assertTrue(
          ((Message)message.getField(f("optionalgroup"))).hasField(groupA));
        Assert.assertTrue(
          ((Message)message.getField(f("optional_nested_message")))
                           .hasField(nestedB));
        Assert.assertTrue(
          ((Message)message.getField(f("optional_foreign_message")))
                           .hasField(foreignC));
        Assert.assertTrue(
          ((Message)message.getField(f("optional_import_message")))
                           .hasField(importD));
  
        Assert.assertTrue(message.hasField(f("optional_nested_enum" )));
        Assert.assertTrue(message.hasField(f("optional_foreign_enum")));
        Assert.assertTrue(message.hasField(f("optional_import_enum" )));
  
        Assert.assertTrue(message.hasField(f("optional_string_piece")));
        Assert.assertTrue(message.hasField(f("optional_cord")));
  
        Assert.assertEquals(101  , message.getField(f("optional_int32"   )));
        Assert.assertEquals(102L , message.getField(f("optional_int64"   )));
        Assert.assertEquals(103  , message.getField(f("optional_uint32"  )));
        Assert.assertEquals(104L , message.getField(f("optional_uint64"  )));
        Assert.assertEquals(105  , message.getField(f("optional_sint32"  )));
        Assert.assertEquals(106L , message.getField(f("optional_sint64"  )));
        Assert.assertEquals(107  , message.getField(f("optional_fixed32" )));
        Assert.assertEquals(108L , message.getField(f("optional_fixed64" )));
        Assert.assertEquals(109  , message.getField(f("optional_sfixed32")));
        Assert.assertEquals(110L , message.getField(f("optional_sfixed64")));
        Assert.assertEquals(111F , message.getField(f("optional_float"   )));
        Assert.assertEquals(112D , message.getField(f("optional_double"  )));
        Assert.assertEquals(true , message.getField(f("optional_bool"    )));
        Assert.assertEquals("115", message.getField(f("optional_string"  )));
        Assert.assertEquals(toBytes("116"), message.getField(f("optional_bytes")));
  
        Assert.assertEquals(117,
          ((Message)message.getField(f("optionalgroup"))).getField(groupA));
        Assert.assertEquals(118,
          ((Message)message.getField(f("optional_nested_message")))
                           .getField(nestedB));
        Assert.assertEquals(119,
          ((Message)message.getField(f("optional_foreign_message")))
                           .getField(foreignC));
        Assert.assertEquals(120,
          ((Message)message.getField(f("optional_import_message")))
                           .getField(importD));
        Assert.assertEquals(126,
          ((Message)message.getField(f("optional_public_import_message")))
                           .getField(importE));
        Assert.assertEquals(127,
          ((Message)message.getField(f("optional_lazy_message")))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBaz, message.getField(f("optional_nested_enum" )));
        Assert.assertEquals(foreignBaz, message.getField(f("optional_foreign_enum")));
        Assert.assertEquals( importBaz, message.getField(f("optional_import_enum" )));
  
        Assert.assertEquals("124", message.getField(f("optional_string_piece")));
        Assert.assertEquals("125", message.getField(f("optional_cord")));
  
        // -----------------------------------------------------------------
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int32"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int64"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed32" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed64" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed32")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed64")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_float"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_double"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bool"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bytes"   )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeatedgroup"           )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_message")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_lazy_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_enum"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_enum"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_enum"    )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string_piece")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_cord")));
  
        Assert.assertEquals(201  , message.getRepeatedField(f("repeated_int32"   ), 0));
        Assert.assertEquals(202L , message.getRepeatedField(f("repeated_int64"   ), 0));
        Assert.assertEquals(203  , message.getRepeatedField(f("repeated_uint32"  ), 0));
        Assert.assertEquals(204L , message.getRepeatedField(f("repeated_uint64"  ), 0));
        Assert.assertEquals(205  , message.getRepeatedField(f("repeated_sint32"  ), 0));
        Assert.assertEquals(206L , message.getRepeatedField(f("repeated_sint64"  ), 0));
        Assert.assertEquals(207  , message.getRepeatedField(f("repeated_fixed32" ), 0));
        Assert.assertEquals(208L , message.getRepeatedField(f("repeated_fixed64" ), 0));
        Assert.assertEquals(209  , message.getRepeatedField(f("repeated_sfixed32"), 0));
        Assert.assertEquals(210L , message.getRepeatedField(f("repeated_sfixed64"), 0));
        Assert.assertEquals(211F , message.getRepeatedField(f("repeated_float"   ), 0));
        Assert.assertEquals(212D , message.getRepeatedField(f("repeated_double"  ), 0));
        Assert.assertEquals(true , message.getRepeatedField(f("repeated_bool"    ), 0));
        Assert.assertEquals("215", message.getRepeatedField(f("repeated_string"  ), 0));
        Assert.assertEquals(toBytes("216"), message.getRepeatedField(f("repeated_bytes"), 0));
  
        Assert.assertEquals(217,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 0))
                           .getField(repeatedGroupA));
        Assert.assertEquals(218,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 0))
                           .getField(nestedB));
        Assert.assertEquals(219,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 0))
                           .getField(foreignC));
        Assert.assertEquals(220,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 0))
                           .getField(importD));
        Assert.assertEquals(227,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 0))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBar, message.getRepeatedField(f("repeated_nested_enum" ),0));
        Assert.assertEquals(foreignBar, message.getRepeatedField(f("repeated_foreign_enum"),0));
        Assert.assertEquals( importBar, message.getRepeatedField(f("repeated_import_enum" ),0));
  
        Assert.assertEquals("224", message.getRepeatedField(f("repeated_string_piece"), 0));
        Assert.assertEquals("225", message.getRepeatedField(f("repeated_cord"), 0));
  
        Assert.assertEquals(301  , message.getRepeatedField(f("repeated_int32"   ), 1));
        Assert.assertEquals(302L , message.getRepeatedField(f("repeated_int64"   ), 1));
        Assert.assertEquals(303  , message.getRepeatedField(f("repeated_uint32"  ), 1));
        Assert.assertEquals(304L , message.getRepeatedField(f("repeated_uint64"  ), 1));
        Assert.assertEquals(305  , message.getRepeatedField(f("repeated_sint32"  ), 1));
        Assert.assertEquals(306L , message.getRepeatedField(f("repeated_sint64"  ), 1));
        Assert.assertEquals(307  , message.getRepeatedField(f("repeated_fixed32" ), 1));
        Assert.assertEquals(308L , message.getRepeatedField(f("repeated_fixed64" ), 1));
        Assert.assertEquals(309  , message.getRepeatedField(f("repeated_sfixed32"), 1));
        Assert.assertEquals(310L , message.getRepeatedField(f("repeated_sfixed64"), 1));
        Assert.assertEquals(311F , message.getRepeatedField(f("repeated_float"   ), 1));
        Assert.assertEquals(312D , message.getRepeatedField(f("repeated_double"  ), 1));
        Assert.assertEquals(false, message.getRepeatedField(f("repeated_bool"    ), 1));
        Assert.assertEquals("315", message.getRepeatedField(f("repeated_string"  ), 1));
        Assert.assertEquals(toBytes("316"), message.getRepeatedField(f("repeated_bytes"), 1));
  
        Assert.assertEquals(317,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 1))
                           .getField(repeatedGroupA));
        Assert.assertEquals(318,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 1))
                           .getField(nestedB));
        Assert.assertEquals(319,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 1))
                           .getField(foreignC));
        Assert.assertEquals(320,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 1))
                           .getField(importD));
        Assert.assertEquals(327,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 1))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBaz, message.getRepeatedField(f("repeated_nested_enum" ),1));
        Assert.assertEquals(foreignBaz, message.getRepeatedField(f("repeated_foreign_enum"),1));
        Assert.assertEquals( importBaz, message.getRepeatedField(f("repeated_import_enum" ),1));
  
        Assert.assertEquals("324", message.getRepeatedField(f("repeated_string_piece"), 1));
        Assert.assertEquals("325", message.getRepeatedField(f("repeated_cord"), 1));
  
        // -----------------------------------------------------------------
  
        Assert.assertTrue(message.hasField(f("default_int32"   )));
        Assert.assertTrue(message.hasField(f("default_int64"   )));
        Assert.assertTrue(message.hasField(f("default_uint32"  )));
        Assert.assertTrue(message.hasField(f("default_uint64"  )));
        Assert.assertTrue(message.hasField(f("default_sint32"  )));
        Assert.assertTrue(message.hasField(f("default_sint64"  )));
        Assert.assertTrue(message.hasField(f("default_fixed32" )));
        Assert.assertTrue(message.hasField(f("default_fixed64" )));
        Assert.assertTrue(message.hasField(f("default_sfixed32")));
        Assert.assertTrue(message.hasField(f("default_sfixed64")));
        Assert.assertTrue(message.hasField(f("default_float"   )));
        Assert.assertTrue(message.hasField(f("default_double"  )));
        Assert.assertTrue(message.hasField(f("default_bool"    )));
        Assert.assertTrue(message.hasField(f("default_string"  )));
        Assert.assertTrue(message.hasField(f("default_bytes"   )));
  
        Assert.assertTrue(message.hasField(f("default_nested_enum" )));
        Assert.assertTrue(message.hasField(f("default_foreign_enum")));
        Assert.assertTrue(message.hasField(f("default_import_enum" )));
  
        Assert.assertTrue(message.hasField(f("default_string_piece")));
        Assert.assertTrue(message.hasField(f("default_cord")));
  
        Assert.assertEquals(401  , message.getField(f("default_int32"   )));
        Assert.assertEquals(402L , message.getField(f("default_int64"   )));
        Assert.assertEquals(403  , message.getField(f("default_uint32"  )));
        Assert.assertEquals(404L , message.getField(f("default_uint64"  )));
        Assert.assertEquals(405  , message.getField(f("default_sint32"  )));
        Assert.assertEquals(406L , message.getField(f("default_sint64"  )));
        Assert.assertEquals(407  , message.getField(f("default_fixed32" )));
        Assert.assertEquals(408L , message.getField(f("default_fixed64" )));
        Assert.assertEquals(409  , message.getField(f("default_sfixed32")));
        Assert.assertEquals(410L , message.getField(f("default_sfixed64")));
        Assert.assertEquals(411F , message.getField(f("default_float"   )));
        Assert.assertEquals(412D , message.getField(f("default_double"  )));
        Assert.assertEquals(false, message.getField(f("default_bool"    )));
        Assert.assertEquals("415", message.getField(f("default_string"  )));
        Assert.assertEquals(toBytes("416"), message.getField(f("default_bytes")));
  
        Assert.assertEquals( nestedFoo, message.getField(f("default_nested_enum" )));
        Assert.assertEquals(foreignFoo, message.getField(f("default_foreign_enum")));
        Assert.assertEquals( importFoo, message.getField(f("default_import_enum" )));
  
        Assert.assertEquals("424", message.getField(f("default_string_piece")));
        Assert.assertEquals("425", message.getField(f("default_cord")));
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Assert (using {@code junit.framework.Assert}} that all fields of
       * {@code message} are cleared, and that getting the fields returns their
       * default values, using the {@link Message} reflection interface.
       */
      public void assertClearViaReflection(MessageOrBuilder message) {
        // has_blah() should initially be false for all optional fields.
        Assert.assertFalse(message.hasField(f("optional_int32"   )));
        Assert.assertFalse(message.hasField(f("optional_int64"   )));
        Assert.assertFalse(message.hasField(f("optional_uint32"  )));
        Assert.assertFalse(message.hasField(f("optional_uint64"  )));
        Assert.assertFalse(message.hasField(f("optional_sint32"  )));
        Assert.assertFalse(message.hasField(f("optional_sint64"  )));
        Assert.assertFalse(message.hasField(f("optional_fixed32" )));
        Assert.assertFalse(message.hasField(f("optional_fixed64" )));
        Assert.assertFalse(message.hasField(f("optional_sfixed32")));
        Assert.assertFalse(message.hasField(f("optional_sfixed64")));
        Assert.assertFalse(message.hasField(f("optional_float"   )));
        Assert.assertFalse(message.hasField(f("optional_double"  )));
        Assert.assertFalse(message.hasField(f("optional_bool"    )));
        Assert.assertFalse(message.hasField(f("optional_string"  )));
        Assert.assertFalse(message.hasField(f("optional_bytes"   )));
  
        Assert.assertFalse(message.hasField(f("optionalgroup"           )));
        Assert.assertFalse(message.hasField(f("optional_nested_message" )));
        Assert.assertFalse(message.hasField(f("optional_foreign_message")));
        Assert.assertFalse(message.hasField(f("optional_import_message" )));
  
        Assert.assertFalse(message.hasField(f("optional_nested_enum" )));
        Assert.assertFalse(message.hasField(f("optional_foreign_enum")));
        Assert.assertFalse(message.hasField(f("optional_import_enum" )));
  
        Assert.assertFalse(message.hasField(f("optional_string_piece")));
        Assert.assertFalse(message.hasField(f("optional_cord")));
  
        // Optional fields without defaults are set to zero or something like it.
        Assert.assertEquals(0    , message.getField(f("optional_int32"   )));
        Assert.assertEquals(0L   , message.getField(f("optional_int64"   )));
        Assert.assertEquals(0    , message.getField(f("optional_uint32"  )));
        Assert.assertEquals(0L   , message.getField(f("optional_uint64"  )));
        Assert.assertEquals(0    , message.getField(f("optional_sint32"  )));
        Assert.assertEquals(0L   , message.getField(f("optional_sint64"  )));
        Assert.assertEquals(0    , message.getField(f("optional_fixed32" )));
        Assert.assertEquals(0L   , message.getField(f("optional_fixed64" )));
        Assert.assertEquals(0    , message.getField(f("optional_sfixed32")));
        Assert.assertEquals(0L   , message.getField(f("optional_sfixed64")));
        Assert.assertEquals(0F   , message.getField(f("optional_float"   )));
        Assert.assertEquals(0D   , message.getField(f("optional_double"  )));
        Assert.assertEquals(false, message.getField(f("optional_bool"    )));
        Assert.assertEquals(""   , message.getField(f("optional_string"  )));
        Assert.assertEquals(ByteString.EMPTY, message.getField(f("optional_bytes")));
  
        // Embedded messages should also be clear.
        Assert.assertFalse(
          ((Message)message.getField(f("optionalgroup"))).hasField(groupA));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_nested_message")))
                           .hasField(nestedB));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_foreign_message")))
                           .hasField(foreignC));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_import_message")))
                           .hasField(importD));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_public_import_message")))
                           .hasField(importE));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_lazy_message")))
                           .hasField(nestedB));
  
        Assert.assertEquals(0,
          ((Message)message.getField(f("optionalgroup"))).getField(groupA));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_nested_message")))
                           .getField(nestedB));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_foreign_message")))
                           .getField(foreignC));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_import_message")))
                           .getField(importD));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_public_import_message")))
                           .getField(importE));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_lazy_message")))
                           .getField(nestedB));
  
        // Enums without defaults are set to the first value in the enum.
        Assert.assertEquals( nestedFoo, message.getField(f("optional_nested_enum" )));
        Assert.assertEquals(foreignFoo, message.getField(f("optional_foreign_enum")));
        Assert.assertEquals( importFoo, message.getField(f("optional_import_enum" )));
  
        Assert.assertEquals("", message.getField(f("optional_string_piece")));
        Assert.assertEquals("", message.getField(f("optional_cord")));
  
        // Repeated fields are empty.
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_int32"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_int64"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_uint32"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_uint64"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sint32"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sint64"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_fixed32" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_fixed64" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sfixed32")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sfixed64")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_float"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_double"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_bool"    )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_string"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_bytes"   )));
  
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeatedgroup"           )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_nested_message" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_foreign_message")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_import_message" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_lazy_message"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_nested_enum"    )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_foreign_enum"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_import_enum"    )));
  
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_string_piece")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_cord")));
  
        // has_blah() should also be false for all default fields.
        Assert.assertFalse(message.hasField(f("default_int32"   )));
        Assert.assertFalse(message.hasField(f("default_int64"   )));
        Assert.assertFalse(message.hasField(f("default_uint32"  )));
        Assert.assertFalse(message.hasField(f("default_uint64"  )));
        Assert.assertFalse(message.hasField(f("default_sint32"  )));
        Assert.assertFalse(message.hasField(f("default_sint64"  )));
        Assert.assertFalse(message.hasField(f("default_fixed32" )));
        Assert.assertFalse(message.hasField(f("default_fixed64" )));
        Assert.assertFalse(message.hasField(f("default_sfixed32")));
        Assert.assertFalse(message.hasField(f("default_sfixed64")));
        Assert.assertFalse(message.hasField(f("default_float"   )));
        Assert.assertFalse(message.hasField(f("default_double"  )));
        Assert.assertFalse(message.hasField(f("default_bool"    )));
        Assert.assertFalse(message.hasField(f("default_string"  )));
        Assert.assertFalse(message.hasField(f("default_bytes"   )));
  
        Assert.assertFalse(message.hasField(f("default_nested_enum" )));
        Assert.assertFalse(message.hasField(f("default_foreign_enum")));
        Assert.assertFalse(message.hasField(f("default_import_enum" )));
  
        Assert.assertFalse(message.hasField(f("default_string_piece" )));
        Assert.assertFalse(message.hasField(f("default_cord" )));
  
        // Fields with defaults have their default values (duh).
        Assert.assertEquals( 41    , message.getField(f("default_int32"   )));
        Assert.assertEquals( 42L   , message.getField(f("default_int64"   )));
        Assert.assertEquals( 43    , message.getField(f("default_uint32"  )));
        Assert.assertEquals( 44L   , message.getField(f("default_uint64"  )));
        Assert.assertEquals(-45    , message.getField(f("default_sint32"  )));
        Assert.assertEquals( 46L   , message.getField(f("default_sint64"  )));
        Assert.assertEquals( 47    , message.getField(f("default_fixed32" )));
        Assert.assertEquals( 48L   , message.getField(f("default_fixed64" )));
        Assert.assertEquals( 49    , message.getField(f("default_sfixed32")));
        Assert.assertEquals(-50L   , message.getField(f("default_sfixed64")));
        Assert.assertEquals( 51.5F , message.getField(f("default_float"   )));
        Assert.assertEquals( 52e3D , message.getField(f("default_double"  )));
        Assert.assertEquals(true   , message.getField(f("default_bool"    )));
        Assert.assertEquals("hello", message.getField(f("default_string"  )));
        Assert.assertEquals(toBytes("world"), message.getField(f("default_bytes")));
  
        Assert.assertEquals( nestedBar, message.getField(f("default_nested_enum" )));
        Assert.assertEquals(foreignBar, message.getField(f("default_foreign_enum")));
        Assert.assertEquals( importBar, message.getField(f("default_import_enum" )));
  
        Assert.assertEquals("abc", message.getField(f("default_string_piece")));
        Assert.assertEquals("123", message.getField(f("default_cord")));
      }
  
  
      // ---------------------------------------------------------------
  
      public void assertRepeatedFieldsModifiedViaReflection(
          MessageOrBuilder message) {
        // ModifyRepeatedFields only sets the second repeated element of each
        // field.  In addition to verifying this, we also verify that the first
        // element and size were *not* modified.
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int32"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int64"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed32" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed64" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed32")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed64")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_float"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_double"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bool"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bytes"   )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeatedgroup"           )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_message")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_lazy_message"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_enum"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_enum"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_enum"    )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string_piece")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_cord")));
  
        Assert.assertEquals(201  , message.getRepeatedField(f("repeated_int32"   ), 0));
        Assert.assertEquals(202L , message.getRepeatedField(f("repeated_int64"   ), 0));
        Assert.assertEquals(203  , message.getRepeatedField(f("repeated_uint32"  ), 0));
        Assert.assertEquals(204L , message.getRepeatedField(f("repeated_uint64"  ), 0));
        Assert.assertEquals(205  , message.getRepeatedField(f("repeated_sint32"  ), 0));
        Assert.assertEquals(206L , message.getRepeatedField(f("repeated_sint64"  ), 0));
        Assert.assertEquals(207  , message.getRepeatedField(f("repeated_fixed32" ), 0));
        Assert.assertEquals(208L , message.getRepeatedField(f("repeated_fixed64" ), 0));
        Assert.assertEquals(209  , message.getRepeatedField(f("repeated_sfixed32"), 0));
        Assert.assertEquals(210L , message.getRepeatedField(f("repeated_sfixed64"), 0));
        Assert.assertEquals(211F , message.getRepeatedField(f("repeated_float"   ), 0));
        Assert.assertEquals(212D , message.getRepeatedField(f("repeated_double"  ), 0));
        Assert.assertEquals(true , message.getRepeatedField(f("repeated_bool"    ), 0));
        Assert.assertEquals("215", message.getRepeatedField(f("repeated_string"  ), 0));
        Assert.assertEquals(toBytes("216"), message.getRepeatedField(f("repeated_bytes"), 0));
  
        Assert.assertEquals(217,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 0))
                           .getField(repeatedGroupA));
        Assert.assertEquals(218,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 0))
                           .getField(nestedB));
        Assert.assertEquals(219,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 0))
                           .getField(foreignC));
        Assert.assertEquals(220,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 0))
                           .getField(importD));
        Assert.assertEquals(227,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 0))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBar, message.getRepeatedField(f("repeated_nested_enum" ),0));
        Assert.assertEquals(foreignBar, message.getRepeatedField(f("repeated_foreign_enum"),0));
        Assert.assertEquals( importBar, message.getRepeatedField(f("repeated_import_enum" ),0));
  
        Assert.assertEquals("224", message.getRepeatedField(f("repeated_string_piece"), 0));
        Assert.assertEquals("225", message.getRepeatedField(f("repeated_cord"), 0));
  
        Assert.assertEquals(501  , message.getRepeatedField(f("repeated_int32"   ), 1));
        Assert.assertEquals(502L , message.getRepeatedField(f("repeated_int64"   ), 1));
        Assert.assertEquals(503  , message.getRepeatedField(f("repeated_uint32"  ), 1));
        Assert.assertEquals(504L , message.getRepeatedField(f("repeated_uint64"  ), 1));
        Assert.assertEquals(505  , message.getRepeatedField(f("repeated_sint32"  ), 1));
        Assert.assertEquals(506L , message.getRepeatedField(f("repeated_sint64"  ), 1));
        Assert.assertEquals(507  , message.getRepeatedField(f("repeated_fixed32" ), 1));
        Assert.assertEquals(508L , message.getRepeatedField(f("repeated_fixed64" ), 1));
        Assert.assertEquals(509  , message.getRepeatedField(f("repeated_sfixed32"), 1));
        Assert.assertEquals(510L , message.getRepeatedField(f("repeated_sfixed64"), 1));
        Assert.assertEquals(511F , message.getRepeatedField(f("repeated_float"   ), 1));
        Assert.assertEquals(512D , message.getRepeatedField(f("repeated_double"  ), 1));
        Assert.assertEquals(true , message.getRepeatedField(f("repeated_bool"    ), 1));
        Assert.assertEquals("515", message.getRepeatedField(f("repeated_string"  ), 1));
        Assert.assertEquals(toBytes("516"), message.getRepeatedField(f("repeated_bytes"), 1));
  
        Assert.assertEquals(517,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 1))
                           .getField(repeatedGroupA));
        Assert.assertEquals(518,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 1))
                           .getField(nestedB));
        Assert.assertEquals(519,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 1))
                           .getField(foreignC));
        Assert.assertEquals(520,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 1))
                           .getField(importD));
        Assert.assertEquals(527,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 1))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedFoo, message.getRepeatedField(f("repeated_nested_enum" ),1));
        Assert.assertEquals(foreignFoo, message.getRepeatedField(f("repeated_foreign_enum"),1));
        Assert.assertEquals( importFoo, message.getRepeatedField(f("repeated_import_enum" ),1));
  
        Assert.assertEquals("524", message.getRepeatedField(f("repeated_string_piece"), 1));
        Assert.assertEquals("525", message.getRepeatedField(f("repeated_cord"), 1));
      }
  
      public void setPackedFieldsViaReflection(Message.Builder message) {
        message.addRepeatedField(f("packed_int32"   ), 601 );
        message.addRepeatedField(f("packed_int64"   ), 602L);
        message.addRepeatedField(f("packed_uint32"  ), 603 );
        message.addRepeatedField(f("packed_uint64"  ), 604L);
        message.addRepeatedField(f("packed_sint32"  ), 605 );
        message.addRepeatedField(f("packed_sint64"  ), 606L);
        message.addRepeatedField(f("packed_fixed32" ), 607 );
        message.addRepeatedField(f("packed_fixed64" ), 608L);
        message.addRepeatedField(f("packed_sfixed32"), 609 );
        message.addRepeatedField(f("packed_sfixed64"), 610L);
        message.addRepeatedField(f("packed_float"   ), 611F);
        message.addRepeatedField(f("packed_double"  ), 612D);
        message.addRepeatedField(f("packed_bool"    ), true);
        message.addRepeatedField(f("packed_enum" ),  foreignBar);
        // Add a second one of each field.
        message.addRepeatedField(f("packed_int32"   ), 701 );
        message.addRepeatedField(f("packed_int64"   ), 702L);
        message.addRepeatedField(f("packed_uint32"  ), 703 );
        message.addRepeatedField(f("packed_uint64"  ), 704L);
        message.addRepeatedField(f("packed_sint32"  ), 705 );
        message.addRepeatedField(f("packed_sint64"  ), 706L);
        message.addRepeatedField(f("packed_fixed32" ), 707 );
        message.addRepeatedField(f("packed_fixed64" ), 708L);
        message.addRepeatedField(f("packed_sfixed32"), 709 );
        message.addRepeatedField(f("packed_sfixed64"), 710L);
        message.addRepeatedField(f("packed_float"   ), 711F);
        message.addRepeatedField(f("packed_double"  ), 712D);
        message.addRepeatedField(f("packed_bool"    ), false);
        message.addRepeatedField(f("packed_enum" ),  foreignBaz);
      }
  
      public void assertPackedFieldsSetViaReflection(MessageOrBuilder message) {
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_int32"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_int64"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_uint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_uint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_fixed32" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_fixed64" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sfixed32")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sfixed64")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_float"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_double"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_bool"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_enum"   )));
        Assert.assertEquals(601  , message.getRepeatedField(f("packed_int32"   ), 0));
        Assert.assertEquals(602L , message.getRepeatedField(f("packed_int64"   ), 0));
        Assert.assertEquals(603  , message.getRepeatedField(f("packed_uint32"  ), 0));
        Assert.assertEquals(604L , message.getRepeatedField(f("packed_uint64"  ), 0));
        Assert.assertEquals(605  , message.getRepeatedField(f("packed_sint32"  ), 0));
        Assert.assertEquals(606L , message.getRepeatedField(f("packed_sint64"  ), 0));
        Assert.assertEquals(607  , message.getRepeatedField(f("packed_fixed32" ), 0));
        Assert.assertEquals(608L , message.getRepeatedField(f("packed_fixed64" ), 0));
        Assert.assertEquals(609  , message.getRepeatedField(f("packed_sfixed32"), 0));
        Assert.assertEquals(610L , message.getRepeatedField(f("packed_sfixed64"), 0));
        Assert.assertEquals(611F , message.getRepeatedField(f("packed_float"   ), 0));
        Assert.assertEquals(612D , message.getRepeatedField(f("packed_double"  ), 0));
        Assert.assertEquals(true , message.getRepeatedField(f("packed_bool"    ), 0));
        Assert.assertEquals(foreignBar, message.getRepeatedField(f("packed_enum" ),0));
        Assert.assertEquals(701  , message.getRepeatedField(f("packed_int32"   ), 1));
        Assert.assertEquals(702L , message.getRepeatedField(f("packed_int64"   ), 1));
        Assert.assertEquals(703  , message.getRepeatedField(f("packed_uint32"  ), 1));
        Assert.assertEquals(704L , message.getRepeatedField(f("packed_uint64"  ), 1));
        Assert.assertEquals(705  , message.getRepeatedField(f("packed_sint32"  ), 1));
        Assert.assertEquals(706L , message.getRepeatedField(f("packed_sint64"  ), 1));
        Assert.assertEquals(707  , message.getRepeatedField(f("packed_fixed32" ), 1));
        Assert.assertEquals(708L , message.getRepeatedField(f("packed_fixed64" ), 1));
        Assert.assertEquals(709  , message.getRepeatedField(f("packed_sfixed32"), 1));
        Assert.assertEquals(710L , message.getRepeatedField(f("packed_sfixed64"), 1));
        Assert.assertEquals(711F , message.getRepeatedField(f("packed_float"   ), 1));
        Assert.assertEquals(712D , message.getRepeatedField(f("packed_double"  ), 1));
        Assert.assertEquals(false, message.getRepeatedField(f("packed_bool"    ), 1));
        Assert.assertEquals(foreignBaz, message.getRepeatedField(f("packed_enum" ),1));
      }
  
      /**
       * Verifies that the reflection setters for the given.Builder object throw a
       * NullPointerException if they are passed a null value.  Uses Assert to throw an
       * appropriate assertion failure, if the condition is not verified.
       */
      public void assertReflectionSettersRejectNull(Message.Builder builder)
          throws Exception {
        try {
          builder.setField(f("optional_string"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_bytes"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_nested_enum"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_nested_message"),
                           (TestAllTypes.NestedMessage) null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_nested_message"),
                           (TestAllTypes.NestedMessage.Builder) null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        try {
          builder.addRepeatedField(f("repeated_string"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.addRepeatedField(f("repeated_bytes"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.addRepeatedField(f("repeated_nested_enum"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.addRepeatedField(f("repeated_nested_message"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
      }
  
      /**
       * Verifies that the reflection repeated setters for the given Builder object throw a
       * NullPointerException if they are passed a null value.  Uses Assert to throw an appropriate
       * assertion failure, if the condition is not verified.
       */
      public void assertReflectionRepeatedSettersRejectNull(Message.Builder builder)
          throws Exception {
        builder.addRepeatedField(f("repeated_string"), "one");
        try {
          builder.setRepeatedField(f("repeated_string"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        builder.addRepeatedField(f("repeated_bytes"), toBytes("one"));
        try {
          builder.setRepeatedField(f("repeated_bytes"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        builder.addRepeatedField(f("repeated_nested_enum"), nestedBaz);
        try {
          builder.setRepeatedField(f("repeated_nested_enum"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        builder.addRepeatedField(
            f("repeated_nested_message"),
            TestAllTypes.NestedMessage.newBuilder().setBb(218).build());
        try {
          builder.setRepeatedField(f("repeated_nested_message"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
      }
    }
  
    /**
     * @param filePath The path relative to
     * {@link #getTestDataDir}.
     */
    public static String readTextFromFile(String filePath) {
      return readBytesFromFile(filePath).toStringUtf8();
    }
  
    private static File getTestDataDir() {
      // Search each parent directory looking for "src/google/protobuf".
      File ancestor = new File(".");
      try {
        ancestor = ancestor.getCanonicalFile();
      } catch (IOException e) {
        throw new RuntimeException(
          "Couldn't get canonical name of working directory.", e);
      }
      while (ancestor != null && ancestor.exists()) {
        if (new File(ancestor, "src/google/protobuf").exists()) {
          return new File(ancestor, "src/google/protobuf/testdata");
        }
        ancestor = ancestor.getParentFile();
      }
  
      throw new RuntimeException(
        "Could not find golden files.  This test must be run from within the " +
        "protobuf source package so that it can read test data files from the " +
        "C++ source tree: " + new File(".").getAbsolutePath());
    }
  
    /**
     * @param filename The path relative to
     * {@link #getTestDataDir}.
     */
    public static ByteString readBytesFromFile(String filename) {
      File fullPath = new File(getTestDataDir(), filename);
      try {
        RandomAccessFile file = new RandomAccessFile(fullPath, "r");
        byte[] content = new byte[(int) file.length()];
        file.readFully(content);
        return ByteString.copyFrom(content);
      } catch (IOException e) {
        // Throw a RuntimeException here so that we can call this function from
        // static initializers.
        throw new IllegalArgumentException(
          "Couldn't read file: " + fullPath.getPath(), e);
      }
    }
  
    /**
     * Get the bytes of the "golden message".  This is a serialized TestAllTypes
     * with all fields set as they would be by
     * {@link #setAllFields(TestAllTypes.Builder)}, but it is loaded from a file
     * on disk rather than generated dynamically.  The file is actually generated
     * by C++ code, so testing against it verifies compatibility with C++.
     */
    public static ByteString getGoldenMessage() {
      if (goldenMessage == null) {
        goldenMessage = readBytesFromFile("golden_message");
      }
      return goldenMessage;
    }
    private static ByteString goldenMessage = null;
  
    /**
     * Get the bytes of the "golden packed fields message".  This is a serialized
     * TestPackedTypes with all fields set as they would be by
     * {@link #setPackedFields(TestPackedTypes.Builder)}, but it is loaded from a
     * file on disk rather than generated dynamically.  The file is actually
     * generated by C++ code, so testing against it verifies compatibility with
     * C++.
     */
    public static ByteString getGoldenPackedFieldsMessage() {
      if (goldenPackedFieldsMessage == null) {
        goldenPackedFieldsMessage =
            readBytesFromFile("golden_packed_fields_message");
      }
      return goldenPackedFieldsMessage;
    }
    private static ByteString goldenPackedFieldsMessage = null;
  
    public static abstract class HackMessage extends GeneratedMessage {
      public interface MyInterface extends BuilderParent {
      }
    }
    /**
     * Mock implementation of {@link GeneratedMessage.BuilderParent} for testing.
     *
     * @author jonp@google.com (Jon Perlow)
     */
    public static class MockBuilderParent
        implements HackMessage.MyInterface {
  
      private int invalidations;
  
      //@Override (Java 1.6 override semantics, but we must support 1.5)
      public void markDirty() {
        invalidations++;
      }
  
      public int getInvalidationCount() {
        return invalidations;
      }
    }
  }
  